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Revision 1.41 - (show annotations)
Fri Oct 25 10:46:13 2002 UTC (18 years, 9 months ago) by nmav
Branch: MAIN
CVS Tags: hydra_0_0_8
Changes since 1.40: +1 -1 lines
*** empty log message ***

1 ** Changes from 0.0.7 to 0.0.8 - 25/10/2002
2 * Better pthread detection.
3 * Better detection of dlopen call.
4 * Some changes to compile in gcc 2.95
5 * Added support for FreeBSD's sendfile (untested).
6 [Ported from Boa 0.94.14rc1]
7 * add new state, IOSHUFFLE, which utilizes sendfile (or
8 emulates it using the request's buffer, otherwise)
9 * make the default socket size 32K. The client_stream_size stays constant
10 at 8K, and the new 'buffer' size is 4K
11 Note also that the new code uses the "default" socket buffer size
12 it obtains with the first accept()ed socket.
13 * make default behavior be to leave stderr alone, but tie it
14 to cgilog otherwise
15 * add [optional, Linux-only] check for sendfile system call
16 * use --disable-sendfile to disable sendfile support
17 sendfile support for files > 100K is default, now.
18 It's significantly faster and easier than the alternative
19 * umask ~0770 before exec
20 * tie stdout to the access_log, unless there is no access_log,
21 in which case tie it to /dev/null
22 * use sensible defaults for umask (077) and (027 for CGI)
23 * add and document new parameters (CGILog and CGIumask)
24 * vast improvements to the cgi-test.cgi program, by Jon Nelson
25 and Landon Curt Noll.
26 * next 3 items by Don Mahurin (patches modified somewhat):
27 * pidfile patch
28 * default mime_types patch
29 * NCSA environment environment variables wrapped in
30 #ifdef USE_NCSA_CGI_ENV
31 * fix some escaping issues with the directory indexer
32 (Ulf Harnhammar)
33 * backport poll support from 0.95
34
35 ** Changes from 0.0.6 to 0.0.7 - 10/10/2002
36 * Added support for large files in 32 bit systems.
37 * Added support for SSL_* variables in CGIs.
38 * Added options in configuration file, to request and verify
39 a client certificate.
40 * The headers of HIC-CGIs are now parsed by the server.
41 * Corrected behavour in SIGHUP signal handling, to reread
42 the SSL related variables.
43 * Children and HIC threads are now killed using a signal, to avoid
44 unexpected errors, and memory leaks.
45
46 ** Changes from 0.0.5 to 0.0.6 - 03/10/2002
47 * Compatibility functions are now automatically included in hydra, if
48 they are not found by the configure script.
49 * Replaced the included scandir function, with the one in libc.
50 * Fixed code, which compiled fine with gcc 3.2, but didn't compile at
51 all, with any other compiler!
52 * Improved the MaxConnections directive semantics.
53 * Added a very primitive mime.types file in examples/ directory.
54
55 ** Changes from 0.0.4 to 0.0.5 - 02/10/2002
56 * If a requested CGI is not accesible then send 404 not found, instead
57 of trying to execute it.
58 * Corrected several stuff in HIC CGI handler. This allows Cookies,
59 POST data and Queries to work properly.
60
61 ** Changes from 0.0.3 to 0.0.4 - 30/09/2002
62 * Added support for If-Range, If-Match, If-None-Match HTTP/1.1 header
63 fields. The server also generates ETag headers for static content using
64 the last modified field of the file, and the file size. This makes
65 Hydra cache friendly.
66 * Added support for multiple HIC threads. This gives a boost to script generation
67 since they are no longer generated sequentially.
68
69 ** Changes from 0.0.2 to 0.0.3 - 28/09/2002
70 * Added support for dynamic modules that handle CGIs
71 internally (HIC). That way Hydra can run PHP.
72 * Fixes in CGI execution. CGIs that are not passed from aliasing
73 functions now properly set PATH_INFO and PATH_TRANSLATED.
74 (Needs further cleanup).
75 * Cleaned up SSL support. Now hydra can be compiled even if gnutls
76 is not available.
77
78 ** Changes from Boa/0.94.13 to Hydra/0.0.2 - 26/09/2002
79 * Added support for SSL 3.0 and TLS 1.0 protocols.
80 * Added support for multiple CPU's by making the server
81 run over a pool of threads.
82 * Changed the file caching code. The mmap() calls are cached until
83 the mmap list table is full.
84 * Added support for HTTP/1.1 ranges.
85 * Added support for hostname based virtual hosting.
86 Also changed the semantics of Alias, ScriptAlias and Redirect, to
87 take advantage of the host based virtual hosting.
88 * Added support for the TCP_CORK tcp option in linux.
89 * Cleaned up the CGI handling (gunzip, indexer are treated as CGIs)
90 * Enhanced grammar to handle 3 and 4 argument options.
91 * Added support for multiple directory indexes.
92 * Dropped support for gunzip.
93 * Use automake to create the distribution.
94
95 ** Changes from 0.94.12 to 0.94.13
96 * Change many instances of log_error_mesg + exit to DIE macro
97 * Change all instance of log_error_mesg (without exit) to WARN macro
98 * do a much better job of checking return values from malloc and
99 especially strdup.
100 * check results of calling umask and getrlimit
101 * server_s is no longer a global int
102 * check results of fork via switch instead of if (fork())
103 * check for getopt.h and include it if found
104 * remove unused #defines, and add WARN macro, and replace
105 many calls to log_error_mesg(..) with WARN macro
106 * fix bug in get_commonlog_time where time_offset calculation was
107 the opposite of what it should be ('-' and '+' were swapped)
108 * fix compatability bug with old and newer versions of flex/yacc
109 * add check for AC_FUNC_MMAP to configure.in
110 * fix really lame thinko in normalize_path, which would prepend the
111 results of earlier calls to results from later calls
112 * Add MaxConnections, a configuration directive which allows the
113 user to specify the maximum number of connections that Boa will
114 accept concurrently.
115 * add SERVER_ADDR and REQUEST_URI to environment of CGI
116 * handle SIGBUS during writes of data that has been memory mapped
117 * minor optimization in select.c that prevents DEAD requests from
118 being added to the block set
119 * fix bug in CGI environment script_name - closes sf.net bug #576725
120 * make 'status' variable local to requests.c, not local to every file
121 by forgetting to declare 'extern' in globals.h :-|
122 * make getsockname non-fatal, and do it every time because we may
123 need it for the CGI
124 * some minor refactoring optimizations in hash.c
125
126 ** Changes from 0.94.11 to 0.94.12
127 * Renamed Changelog ChangeLog, and moved up to top-level directory
128 * Next 3 items due in part or whole thanks to
129 Liam Widdowson
130 * when printf'ing a pid type, force to int, because it could be
131 something else on other platforms. Should probably change it to
132 a long, and use that.
133 * backported chroot commandline support from 0.95
134 * backported support for strdup, strstr, alphasort, and scandir
135 from 0.95
136 * Fixed src/Makefile.in -- it didn't remove index_dir.o
137 * backport create_temporary_file from 0.95
138 (instead of using tmpnam)
139 * Allow non-standard date format 31 September 2000 23:59:59 GMT
140 Patch by Landon Curt Noll
141 * Skip whitespace before HTTP/major.minor
142 Adapted patch from Landon Curt Noll
143 * open /dev/null first thing (affects chrooting)
144 * properly handle sigalrm -- use sigalrm_flag and sigalrm_run
145 instead of handling the signal in the signal handler
146 * update manpage slightly
147 * send 400 BAD Request when resource does not start with '/'
148 * add grp.h to boa.h's includes -- remove from boa.c and config.c
149 * removed duplicate header includes from boa.c, config.c, get.c,
150 ip.c, request.c, response.c
151 * factor out creating the server socket and dropping privs
152 into create_server_socket and drop_privs
153 * type all functions in boa.c (except main) as static
154 * set umask after opening /dev/null
155 * tie stdin/stdout to /dev/null before commandline parse
156 * removed old, unused chroot code
157 * move builds_needs_escape earlier in the startup
158 * move fork later in the startup
159 * type all c_set_* as static in config.c
160 * don't bother trying to change uid/gid (or error if the
161 requested uid/gid doesn't exist) if not UID 0
162 * return more appropriate error code when foo.html gives
163 access denied, but foo.html.gz gives some other error
164 (essentially report error associated with foo.html, not foo.html.gz)
165 * send NOT Implemented when an unknown method is attempted
166 * always attempt a 32k read right before close
167 (stopgap until blackhole can be merged)
168 * allow more than 1 space in logline between method, resource,
169 and http version
170 * don't use inline functions
171 * update configure.in so that autoconf 2.50 doesn't complain (as much)
172 * properly use VPATH and srcdir according to autoconf docs
173 * change curly-braces to parentheses in Makefilein
174 * use $^ instead of manually listing the dependencies in Makefile.in
175 * remove tests section in Makefile.in
176 * write tags not TAGS in Makefile.in
177 * Add gethostbyname and inet_aton to function checks
178 * Add code from 0.95 which checks for socket in -lsocket,
179 inet_aton in -lresolv, and gethost{by}name in -lnsl
180 * Also remove broken bc-based "how big is an unsigned int" checks:
181 assume minimum of 32 bits and check in escape.c at runtime.
182 * Added new file: README.chroot.solaris, based on a
183 modified version by Liam Widdowson
184 * Add check_struct_for.m4, which allows us to check a structure
185 for a member (found at http://www.gnu.org/software/ac-archive/
186 authored by Wes Hardaker
187 * Call "aclocal -I ." to rebuild aclocal.m4
188 * Using new check-struct-for-member autoconf macro, check
189 for tm_gmtoff and tm_zone in struct tm -- useful in
190 portability tests for localtime.
191 * Also check sockaddr_in for structure sin_len so we can set
192 it properly.
193 * index_dir.c (which ends up in boa_indexer) can now be compiled
194 with USE_LOCALTIME, and if so, it will report the local time
195 using the timezone name. Otherwise it uses UTC time and UTC
196 timezone designation.
197 * fix buglet in mmap_cache.c which shows up when under
198 heavy load by many different files.
199 Found and squashed by Michal Kara
200 * normalize paths on Aliases, log files, server root, dirmaker
201 This makes sure that paths are 'absolute'
202 * don't generate DOCUMENT_ROOT or SERVER_ROOT,
203 CGIs have no business knowing that information
204 * if CGI, chdir to the cgi's root path
205 Bug found by Matt Callaway
206 * remove ChrootPath and PidFile directives from the parser
207 (they aren't used anyway)
208 * keep track of maximum file descriptor in use to optimize call
209 to select()
210 * apply IPv6 patch from Jari Korva
211 * optimize keep-alive copy data routine
212 * try to use memcpy instead of strcpy/strcat in more places (alias.c)
213 * update .depend file
214 * use fcntl + GET_FL to get a file descriptor's flags, then
215 add or remove only the bits we want to set. This prevents
216 accidentally setting or unsettings bits we don't have anything
217 to do with inadvertantly. (removed, at least temporarily.
218 Show me a system where it is needed -- LRD)
219 * make sure to call FD_ZERO when we handle a restart
220 * in read.c, don't call boa_perror on read failure -- socket is
221 dead or messed up anyway, no reason to try to write to it.
222 * explicit .SUFFIXES in Makefile.in
223 * boa.objdump target added
224 * use @MAKE_SET@ (for when $(MAKE) != "make")
225 * add -Wundef -Wwrite-strings -Wredundant-decls -Winline to GCC_FLAGS
226 * change Paul Phillips' and Larry Doolittle's emails in source
227 * add --disable-debug, --enable-profile, --with-dmalloc, and --with-efence
228 * test for failed-but-return-was-successful setuid:
229 http://www.securityfocus.com/bid/1322
230 * use _exit not exit in CGI child
231 * always place new keepalive request on blocked list, we can't be
232 sure of the state of the active list, and since enqueue places
233 things at the *front* of the list, it doesn't do us much good
234 to place the new request on the active list anyway.
235 * update some Copyright statements for 2002
236 * When comparing the uri to an alias, only compare if
237 the uri length is greater than or equal to the length of the alias
238 * in init_script_alias, make sure to check for document_root before
239 trying to use it
240 * script_name is now just a copy of the request, rather
241 than some complicated variation on the pathname
242 * change the way the CGI environment is handled.
243 Now, it is allocated at request allocation time, and exists
244 throughout the life of the structure.
245 * check memory allocations, etc.. when creating the static
246 CGI environment and when making new CGI environment variables
247 * wait until process_option_end to call unescape_uri, clean_pathname,
248 and translate_uri
249 * remove debian package information
250 * move RedHat packaging information to contrib
251 * remove tests -- they weren't usable anyway
252 * add some new hash routines, and use djb2 (a variant on a
253 hash algorithm popularized by Dan J. Bernstein)
254 * a side-effect of the new hash routines is a bugfix,
255 involving negative return values from hash routines.
256 This has been fixed.
257 * add a routine, show_hash_stats, which is called with other
258 statistical output via sigalarm
259 * remove some duplicate prototypes from config.c
260 * make simple_itoa take an unsigned int
261 * try to make NOBLOCK handling in compat.h compatible with Solaris
262 * make sure to update current_time before calling signal handlers
263 * alter primary loop to make sure that select gets called even
264 when there are requests that are not blocking, and call fdset_update
265 and process_requests (when appropriate) after signal handlers but
266 before select to make sure that blocked requests are still handled
267 by select after a sighup. (Thanks to Karl Olsen)
268 * pull select loop into select.c
269 * poll server socket once per active connection
270 * add send_r_service_unavailable and use it when appropriate
271 * state uptime in seconds at normal program termination
272 * include sys/fcntl.h if it is found by configure
273 * fix POST bug where a content-length < 0 would cause Boa to
274 consume its full share of CPU until killed
275 Bug report by Landon Curt Noll
276 * add CGIPath configuration variable
277 based upon a patch by Landon Curt Noll
278 * add function boa_atoi, which wraps atoi, but does not
279 accept negative values. Additionally, it checks to make sure
280 the converted value and the original value are the same, avoiding
281 issues like "124.3" -> "123" and "123abc" -=> "123".
282 Either a value is an int or it isn't - no middle ground.
283 * use boa_atoi to convert content-length from client.
284 * add new #define - SINGLE_POST_LIMIT_DEFAULT, which defines
285 (in bytes) the *default* single_post_limit.
286 * single_post_limit is now in bytes.
287 * when adding aliases, only "normalize" paths that start
288 with "./" - this is a departure from previous behavior
289 * add "?" to the list of characters that it is safe to leave unescaped
290 * clean up Makefile.in of no-longer-pertinent comments
291 * add send_r_bad_gateway and use it
292 * tie stderr to either cgi_log_fd or devnullfd - either way
293 make sure stderr is a valid filehandle before cgi execution
294 * cgi_env is no longer allocated, it's part of the struct now
295 * fix bug in CgiPath logic
296 * when unable to allocate memory for an environment variable, log it
297 * add clear_common_env, which de-allocates the cgi_common_env stuff
298 [NEVER USE THIS outside of a terminal signal handler!]
299 * don't be so wasteful of memory in normalize_path
300 * adapted fix for alias expansion from Brieuc Jeunhomme
301
302 ** Changes from 0.94.10.1 to 0.94.11
303 * use LIBS in Makefile.in (which propagates from autoconf)
304 * properly free memory allocated by scandir in index_dir.c
305 * rearrange some header files and includes
306 * on reads and writes, don't check for -1, check for < 0
307 * include fix by William Meadows
308 for escape.c which fixes segfaults due to improper allocation
309 * above fix by William Meadows no longer needed;
310 escape.c and escape.h rewritten by Larry Doolittle -- requires
311 at least 32 bit words, but is correct (jdn's 1st attempt was faulty)
312
313 ** Changes from 0.94.10 to 0.94.10.1
314 * Actually update the SERVER_VERSION in src/defines.h
315
316 ** Changes from 0.94.9 to 0.94.10
317 * Fixes escaping rules
318 * Fixes segfault when directory_index is undefined and
319 directory needs to be generated
320 * adds dummy signal handlers for SIGUSR1 and SIGUSR2 (Closes SF #425921)
321 * Update documentation regarding mime.types (Closes Debian #69991)
322 * Make sure documentation builds (Closes Debian #110818)
323
324 ** Changes from 0.94.8.3 to 0.94.9
325 * src/Makefile.in updated to take CFLAGS, LIBS, and LDFLAGS
326 from autoconf
327 * Update escaping rules with latest RFC
328 * unescape_uri skips fragments and also stop parsing at '?'
329 * Don't accept fd over FD_SETSIZE in request.c:get_request
330 * use backported documentation from 0.95
331 * make sure POST fd gets closed even on client cancel
332 * use backported index_dir.c from 0.95
333 * support subdirectories in ScriptAlias directories
334 * add SinglePostLimit (int, in Kilobytes) to config system
335 * check for ENOSPC on body write
336 * use environment variable TMP (or "/tmp" if not available),
337 and chdir there when boa exits.
338 * add 1-time-only hack to make a 32kB read at the end of a request
339 on POST or PUT
340 * close unused file descriptors (/dev/null in boa.c, and the
341 unused part of the pipes call in cgi.c)
342 * made Makefile.in VPATH happy
343
344 ** Changes from 0.94.8.2 to 0.94.8.3
345 * Move unescape_uri *before* clean_pathname to prevent
346 encoding of / and .. in pathname
347 * wrap execution of GUNZIP in cgi.c with #ifdef GUNZIP
348 * stop parsing when fragment found in URL ('#')
349
350 ** Changes from 0.94.8.1 to 0.94.8.2
351 * close pipes[1] in child and generate HTTP_REFERER environment
352 variable in cgi.c
353 * Minor changes to the Debian package
354
355 ** Changes from 0.94.8 to 0.94.8.1
356 * Change umask call from (umask(0600)) to (umask(~0600))
357
358 ** Changes from 0.94.7 to 0.94.8
359 * Fix major thinko in temp file permissions
360 * unlink temporary file immediately following creation
361 * implement maximum # of active connections at 10 less than RLIMIT_NOFILE
362 to avoid or eliminate crashes resulting from running out of
363 file descriptors
364 * Fix thinko in POST
365
366 ** Changes from 0.94.6 to 0.94.7
367 * STDIN and STDOUT are now tied to /dev/null
368 * sets PATH_MAX to 2048 if not defined (for Hurd)
369 * core dumps (should never happen) would be located in /tmp
370 * alter behavior when select gets a EBADF
371 * add translation for the \" char -> &quot;
372 * remove use of sys_errlist. Use perror.
373 * better makedist.sh (still a stupid program though)
374
375 ** Changes from 0.94.5 to 0.94.6
376 * Removed doc++ commenting
377 * Removed erroneous debugging statments
378 * Move some stuff out of config.c (read_config_file) to boa.c
379 * Altered some of fixup_server_root()
380 * Bug fix in get.c re: automatic gunzip
381 * Added some stubs for chroot code (*not* ready yet)
382
383 ** Changes from 0.94.4 to 0.94.5
384 * Alteration of most of the comments and such for doc++ use
385 * Fixed buffer overflow in alias.c
386 * Fixed buffer underflow in util.c
387
388 ** Changes from 0.94.3 to 0.94.4
389 * Better escaping of data to user, both for HTTP headers and HTML body
390 * Proper escaping of output in CGI example perl scripts
391
392 ** Changes from 0.94.0 to 0.94.2
393 * Fixed obnoxious pipeline bug
394 * Fixed (sorta) a compilation/core bug for *BSD systems
395 Original code by Thomas Neumann
396 * Moved to GPLv2
397 * Changed manpage to section 8
398 * boa.sgml now references a .png file instead of evil .gif
399
400 ** Changes from 0.93.19.2 to 0.94.0
401 * Added UseGMT to the configuration parser
402 * util.c commonlog now logs in Apache-style commonlog time format
403 * Remove SO_SNDBUF on-start message
404
405 ** Changes from 0.93.19 to 0.93.19.2
406 * Changed to combined log (from NCSA access_log format) ala Drew Streib
407 * Altered POST cgi code to handle bug in Netscape
408 * SO_SNDBUF changes by Larry
409
410 ** Changes from 0.93.17.2 to 0.93.19 (all 0.93.18.x changes inclusive)
411 * Update of some copyright statements for 99
412 * Replacement of sprintf with strlen/memcpy or strcpy/strcat
413 wherever possible
414 * Significant rearrangement in alias.c, minor functional differences
415 (some CGI environment variables handled differently)
416 * Removal of die function. Replace with log_err_mesg and exit.
417 * initial IPv6 stubs and support
418 * Move #include "config.h" to top of boa.h where it will do some good
419 * Stubs and functions for strstr and strdup
420 * Seperation of buffer code into it's own file
421 * Significant changes to cgi.c et al (cgi_header.c, etc...)
422 * Speed patches by removal of "extra" calls to time(): Use global variable!
423 * pipelining changes... it works now.
424 * require content-length from clients (ala rfc1945)
425 * alter body_read and body_write to work more efficiently with known content-length
426 * move read(2) part to *after* parsing...
427 * added support for additional header message in send_redirect_temp
428 * change use of NO_ZERO_FILL_LENGTH to offsetof() use
429 * Remove SO_REUSEADDR setting on each client socket, Paul Saab
430 * Avoid SO_SNDBUF setting if possible
431 * Large quantities of otherwise not-insignificant changes
432
433 ** Changes from 0.93.17.2 to 0.93.17.3
434 * Put on-the-fly directories back in, stripped down from the 0.92 version
435 * Fixed DocumentRoot, ServerAdmin and ServerName null-value handling in
436 CGI environment generation
437 * Fixed argument order in Script* directives (bug introduced in 0.93.17.2)
438 * Got rid of MAX_CGI_VARS because it was not being used consistently, or
439 for that matter, at all, really.
440 * Added some more FASCIST_LOGGING to cgi.c
441 * Minor mmap patch by LRD for request.c
442
443 ** Changes from 0.93.17.1 to 0.93.17.2
444 * Added "Listen" directive for server bind address, as most recently
445 suggested by David N. Welton
446 * Put virtualhost feature in, was experimental in 0.92q
447
448 ** Changes from 0.93.16.2 to 0.93.17.1
449 * New config file parser (supposed to be more maintainable) (LRD)
450 * Support for "|command" and ":host:port" syntax for logfiles (untested) (LRD)
451
452 ** Changes for the 0.93 version **
453 * Huge quantities of changes
454 * keepalive Bugfix in 0.93.16.2 by Jon Nelson
455 report by Craig Silverstein of Google fame.
456 * patch for config.h by Craig Silverstein
457 * fixed "Parent Directory" problem in boa_indexer for title "/"
458 (Debian bug #36165)
459 * More Craig Silverstein
460 modifications, namely:
461 ErrorLog (if omitted, print to stderr)
462 DocumentRoot (if omitted, can only server user-dir files)
463 DirectoryIndex (if omitted, always use DirectoryMaker)
464 MimeTypes (if omitted, don't load -- users can use AddType instead)
465
466
467 ** Changes from v0.92o to v0.92p **
468
469 * Documented misbehavior of CGI, SIGHUP, short aliases, stale dircache.
470 * Documented how to patch signals.c for use on SunOS.
471 * Closed file descriptor leak when redirecting a bare directory URL to
472 one with an appended "/".
473 * Closed potential file descriptor leak if errors encountered generating
474 on-the-fly index.
475 * Cleaned up include file handling to be simultaneously compatible with
476 Linux, SunOS, HP-UX, and AIX.
477 * Supress message body for codes 302, 400, 403, 404, 500, and 501 if
478 incoming request is "HEAD".
479
480 ** Changes from v0.91 to v0.92o **
481 (0.92o released 27 December, 1996)
482
483 * Maintenance handover from Paul Phillips to Larry Doolittle
484 * Changed (char)NULL to '\0'
485 * Cleaned up signal handler prototypes in signals.c
486 * Modified handling of CGI environment variable PATH_TRANSLATED,
487 should now work the same as NCSA.
488 * More conservative buffer size in add_cgi_env()
489 * Build argv list for a CGI script according to spec
490 * Speedup process_header_line, eliminate potential memory leak
491 * Occasional spelling fixes and lint removal
492 * Added REMOTE_PORT env var for CGI scripts, to allow easy ident lookups
493 * Changed rfc822 time format
494 * Log timeouts and broken connections
495 * Fix mime suffix handling for filenames with multiple "."s
496 * Initialize conn->time_last, fixes bug with rapid-fire connections
497 * Performance tweak to req_write()
498 * Changed http_version from float to char[8]
499 * Rewrote on-the-fly directory generation; it works now
500 * Added user configurable dircache directory in boa.conf
501 * Fixed "simple" response bugs, including incorrect CGI handling
502 * Keepalive (HTTP/1.1 draft) support, mostly by Jon Nelson
503 * Close data_fd in 304 Not Modified flow of control
504 * Switch socket flags to non-blocking before cgi handoff
505 * Try to handle errno properly in the face of multiple errors
506 * Close fd's of all other transactions before cgi handoff
507 * Move real work for sighup and sigchld out of signal handler
508 * Fix free(req->cgi_env) in request.c
509 * Response message cleanup - better match to HTML-2.0 DTD
510 * Experimental Virtual Host code from Russ Nelson
511 * Expand buffer for escaped URI in init_get()
512 * SIGTERM triggers lame duck mode until all pending transactions complete
513 * Close and unlink temp file for POST in parent process
514
515 ** Changes from v0.90 to v0.91 **
516
517 * Cleaned up main while loop
518 * Optimized request line parsing
519 * Added state machine for header reads -- necessary to deal wtih
520 possibility of obtaining header data in multiple reads. This
521 also allows interactive use of server.
522 * Added 500/501 return codes for various conditions
523
524 ** v0.90 **
525
526 * Initial release
527

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