Changes with Apache 2.0a7
6238
6239	  *) Reimplement core_output_filter to buffer/save bucket brigades
6240	     across multiple calls to the core_filter. The brigade will be
6241	     sent when either MIN_BYTES_TO_SEND or MAX_IOVEC_TO_WRITE
6242	     thresholds are hit or the EOS bucket is received.
6243	     [Bill Stoddard]
6244
6245	  *) Create experimental filter (buffer_filter) that coalesces bytes
6246	     into one large buffer before invoking the next filter in the
6247	     chain. This filter is particularly useful with the current
6248	     implementation of mod_autoindex when it inserted above the
6249	     chunk_filter. mod_autoindex generates a lot of brigades that
6250	     containing buckets holding just a few bytes each. The
6251	     buffer_filter coalesces these buckets into a single large bucket.
6252	     [Bill Stoddard]
6253
6254	  *) Add apr_sendfile() support into the core_output_filter.
6255	     [Bill Stoddard]
6256
6257	  *) Add apr_sendv() support into the core_output_filter.
6258	     [Bill Stoddard]
6259
6260	  *) Fix mod_log_config so that it compiles cleanly with BUFFERED_LOGS
6261	     [Mike Abbott <mja sgi.com>]
6262
6263	  *) Remove ap_send_fb.  This is no longer used in Apache, and it doesn't
6264	     make much sense, because Apache uses buckets instead of BUFFs now.
6265	     [Ryan Bloom]
6266
6267	  *) send_the_file now falls back to a read/write loop on platforms that
6268	     do not have sendfile.
6269	     [Ryan Bloom and Brian Havard]
6270
6271	  *) Install apachectl correctly, and substitute the proper values so
6272	     that it works again.  [Ryan Bloom]
6273
6274	  *) Better(??) handle platforms that lack sendfile().
6275	     [Jim Jagielski]
6276
6277	  *) APR now has UUID generation/formatting/parsing support.
6278	     [Greg Stein]
6279
6280	  *) Begin the http_filter.  This is an input filter that understands
6281	     the absolute basic amount required to parse an HTTP Request.  The
6282	     goal is to be able to split headers from request body before passing
6283	     the data back to the other filters.
6284	     [Ryan Bloom]
6285
6286	  *) Bring forward from 1.3.13 the config directory implementation
6287	     [Jim Jagielski]
6288
6289	  *) install apxs if it is created
6290	     [Ryan Bloom]
6291
6292	  *) Added APR_IS_STATUS_condition test macros to eliminate canonical error
6293	     conversions.  [William Rowe]
6294
6295	  *) Now that we have ap_add_input_filter(), rename ap_add_filter() to
6296	     ap_add_output_filter().  [Jeff Trawick]
6297
6298	  *) Multiple build and configuration fixes
6299	    Build process:
6300
6301	      -add datadir and localstatedir substitutions
6302	      -fix layout name
6303	      -fix logfilename misspelling
6304	      -fix evaluation of installation dir variables and
6305	      -replace $foobar by $(foobar) to be usefull in the makefile
6306
6307	    Cross compile:
6308
6309	      -add rules for cross-compiling in rules.mk. Okay, rule to check for
6310	       $CC_FOR_BUILD is still missing
6311	      -use CHECK_TOOL instead of CHECK_PROG for ranlib
6312	      -add missing "AR=@AR@" to severaly Makefile.in's
6313	      -cache result for "struct rlimit"
6314	      -compile all helper programs with native and cross compiler
6315	       and use the native version to generate header file
6316	     [Rüdiger Kuhlmann <Tadu gmx.de>]
6317
6318	  *) Prepare our autoconf setup for autoconf 2.14a and for cross-
6319	     compiling.
6320	     [Rüdiger Kuhlmann <Tadu gmx.de>]
6321
6322	  *) Fix a bug where a client which only sends \n to delimit header
6323	     lines (netcat) gets a strange looking HTTP_NOT_IMPLEMENTED
6324	     message.  Start working on ebcdic co-existance with input
6325	     filtering.
6326	     [William Rowe, Greg Ames]
6327
6328	  *) If mod_so is enabled in the server always create libexec, even
6329	     if there are no modules installed in this directory.  This is a
6330	     requirement for APXS to work correctly.
6331	     [Ryan Bloom]
6332
6333	  *) Connection oriented output filters are now stored in the
6334	     conn_rec instead of the request_rec.  This allows us to add the
6335	     output filter in the pre-connection phase instead of the
6336	     post_read_request phase, which keeps us from trying to write an
6337	     error page before we have a filter to write to the network.
6338	     [Ryan Bloom, Jeff Trawick, and Greg Ames]
6339
6340	  *) Cleaning up an mmap bucket no longer deletes the mmap.  An
6341	     mmap can be used across multiple buckets (default_handler with
6342	     byte ranges, mod_file_cache, mod_mmap_static), so cleanup of
6343	     the mmap itself can't be associated with the bucket.
6344	     [Jeff Trawick]
6345
6346	  *) Add .dll caching directive ISAPICacheFile to mod_isapi.
6347	     [William Rowe]
6348
6349	  *) Radical surgery to improve mod_isapi support under Win32.
6350	     Includes a number of newer ServerSupportFunction calls, support
6351	     for ReadClient (in order to retrieve POSTs greater than 48KB),
6352	     and general bug fixes to more reliably load ISAPI .dll's and
6353	     prevent leaking handle resources.  Note: There are still
6354	     discrepancies between IIS's and Apache's ServerVariables, and
6355	     async calls are still not supported.  Additional warnings are
6356	     logged to facilitate debugging of unsupported ISAPI calls.
6357	     [William Rowe]
6358
6359	  *) Add input filtering to Apache.  The basic idea for the input
6360	     filters is the same as the ideas for output filters.  The biggest
6361	     difference is that instead of calling ap_pass_brigade, ap_get_brigade
6362	     should be called, and the order of execution for the filter itself is
6363	     different.  When writing an output filter, a brigade is passed in,
6364	     and filters operate directly on that brigade, when done, they call
6365	     ap_pass_brigade.  Input filters are the exact opposite.  Because input
6366	     is not a push operation, filters first call ap_get_brigade.  When this
6367	     function returns, the input filter will be left with a valid brigade.
6368	     The input filter should then operate on the brigade, and return.
6369	     [Ryan Bloom]
6370
6371	  *) Fix building on BSD/OS using its native make. The build system
6372	     falls back to the BSD .include directive on that host platform.
6373	     [Sascha Schumann]
6374
6375	  *) Expand dbmmanage to allow -d -m -s -p options for Crypt, MD5,
6376	     SHA1 and plaintext password encodings.  Make feature tests a
6377	     bit more flexible.  [William Rowe]
6378
6379	  *) Charset translation: mod_charset_lite handles output content
6380	     translation in a filter.  mod_charset_lite no longer ignores
6381	     subrequests.  A bunch of cruft related to BUFF's support for
6382	     translating request and response bodies was removed.
6383	     [Jeff Trawick]
6384
6385	  *) Move the addition of the CORE filter to the post_read_request
6386	     hook in http_core.c.  This removes the need to add the filter in
6387	     multiple places and allows for an SSL module to be added much
6388	     simpler. [Ryan Bloom]
6389
6390	  *) SECURITY: CVE-2000-0913 (cve.mitre.org)
6391	     Fix a security problem that affects certain configurations of
6392	     mod_rewrite. If the result of a RewriteRule is a filename that
6393	     contains expansion specifiers, especially regexp backreferences
6394	     $0..$9 and %0..%9, then it may be possible for an attacker to
6395	     access any file on the web server. [Tony Finch]
6396
6397	  *) Fix a bug where errors that are detected during early request parsing
6398	     don't produce visible HTTP error messages at the browser, because
6399	     the core_filter wasn't present.  [Greg Ames]
6400
6401	  *) Provide apr_socklen_t as a portability aid.
6402	     [Victor  J. Orlikowski]
6403
6404	  *) Overhaul of dbmmanage to allow a groups arg (as in Apache 1.2)
6405	     as well as a comment arg to the add, adduser and update cmds.
6406	     update allows the user to clear or preserve pw/groups/comment.
6407	     Fixed a bug in dbmmanage that prevented the check option from
6408	     parsing a password followed by :group... text.  Corrected the
6409	     seed calcualation for Win32 systems, and added -lsdbm support.
6410	     [William Rowe]
6411
6412	  *) Configured mod_auth_dbm to compile with sdbmlib under Win32.
6413	     [William Rowe]
6414
6415	  *) Avoid a segfault when parsing .htaccess files.  An
6416	     uninitialized tree pointer was passed to ap_build_config().
6417	     [Jeff Trawick]
6418
6419	  *) Change the way that inet_addr & inet_network are checked for
6420	     in APR's configure process to allow BeOS BONE to correctly
6421	     find them. With this change BeOS BONE now builds from source
6422	     with no problems.  [David Reid]
6423
6424	  *) Fix a bug in apr_create_process() for Unix.  The NULL signifying
6425	     the end of the parameters to execve() was stored in the wrong
6426	     location, overlaying the storage beyond the newargs[] array and
6427	     also passing uninitialized storage to execve(), which would
6428	     sometimes fail with EFAULT.  [Jeff Trawick]
6429
6430	  *) Fix a bug parsing configuration file containers.  With a sequence
6431	     like this in the config file
6432
6433	       <IfModule mod_kilroy.c>
6434	       any stuff
6435	       </IfModule>
6436	       <IfModule mod_lovejoy.c>
6437	       (blank line)
6438	       any stuff
6439	       </IfModule>
6440
6441	     the second container would be terminated at the blank line due to
6442	     sediment in the buffer from reading the prior </IfModule> and an
6443	     error message would be generated for the real </IfModule> for the
6444	     second container.  Also due to this problem, any two characters
6445	     could be used for "</" in the close of a container.
6446	     [Jeff Trawick]
6447
6448	  *) ap_add_filter prototype changed to remove the ctx pointer.  The
6449	     pointer still remains in the filter structure, but it can not be
6450	     a part of the ap_add_filter prototype.  The reason is that when
6451	     the core uses AddFilter to add a filter to the stack it doesn't
6452	     know how to allocate the ctx pointer, or even how much memory should
6453	     be allocated.  The filters will have to be responsible for allocating
6454	     the ctx memory when they need it.
6455	     [Ryan Bloom]
6456
6457	  *) Add an AddFilter directive.  This directive takes a list of filters
6458	     that should be activated for the requested resource.
6459	     [Ryan Bloom]
6460
6461	  *) apr_snprintf(): Get quad format strings working on OS/390 (and perhaps
6462	     some other platforms).  [Jeff Trawick]
6463
6464	  *) Modify mod_include to be a filter.  Currently, it has only been tested
6465	     on actual files, but it should work for CGI scripts too.
6466	     [Ryan Bloom]
6467
6468	  *) apr_putc(), apr_puts() for Unix: handle buffered files and interrupted
6469	     writes.  apr_flush() for Unix: handle interrupted writes.
6470	     [Jeff Trawick]
6471
6472	  *) NameVirtualHost can now take "*" as an argument instead of
6473	     an IP address. This allows you to create a purely name-based
6474	     virtual hosting server that does not have any IP addresses in
6475	     the configuration file and which ignores the local address
6476	     of any connections. PR #5595, PR #4455 [Tony Finch]
6477
6478	  *) Fix some compile warnings in mod_mmap_static.c
6479	     [Mike Abbott <mja sgi.com>]
6480
6481	  *) Fix chunking problem with CGI scripts.  The general problem was that
6482	     the CGI modules were adding an EOS bucket and then the core added an
6483	     EOS bucket.  The chunking filter finalizes the chunked response when it
6484	     encounters an EOS bucket.  Because two EOS buckets were sent, we
6485	     finalized the response twice.  The fix is to make sure we only send one
6486	     EOS, by utilizing a flag in the request_rec.
6487	     [Ryan Bloom]
6488
6489	  *) apr_put_os_file() now sets up the unget byte appropriately on Unix
6490	     and Win32.  Previously, the first read from an apr_file_t set up via
6491	     apr_put_os_file() would return a '\0'.  [Jeff Trawick]
6492
6493	  *) Mod_cgid now creates a single element bucket brigade, with a pipe
6494	     bucket, instead of using BUFF's and ap_r*.
6495	     [Ryan Bloom]
6496
6497	  *) APRVARS.in no longer overwrites the EXTRA_LIBS variable.
6498	     [Mike Abbott <mja sgi.com>]
6499
6500	  *) Remove ap_bopenf from buff code.  This required modifying the file_cache
6501	     code to use APR file's directly instead of going through BUFFs.
6502	     [Ryan Bloom]
6503
6504	  *) Fix compile break on some platforms for mod_mime_magic.c
6505	     [John K. Sterling <sterling covalent.net>]
6506
6507	  *) Fix merging of AddDefaultCharset directive.
6508	     PR #5872 (1.3) [Jun Kuriyama <kuriyama imgsrc.co.jp>]
6509
6510	  *) Minor revamp of the rlimit sections of code. We now test
6511	     explicitly for setrlimit and getrlimit. Also, unixd_set_rlimit()
6512	     is now "available" even if the platform doesn't support
6513	     the rlimit family (it's just a noop though). [Jim Jagielski]
6514
6515	  *) Migrate the pre-selection of which MPM to use for specific
6516	     platforms to hints.m4, which contains (or should contain)
6517	     all platform specific "hints". [Jim Jagielski]
6518
6519	  *) Remove IOLs from Apache.  With filtering, IOLs are no longer necessary
6520	     [Ryan Bloom]
6521
6522	  *) Add tables with non-string/binary values to APR.
6523	     [Ken Coar]
6524
6525	  *) Fix some bad calls to ap_log_rerror() in mod_rewrite.
6526	     [Jeff Trawick]
6527
6528	  *) Update PCRE to version 3.2.  [Ryan Bloom]
6529
6530	  *) Change the way buckets' destroy functions are called so that
6531	     they can be more directly used when changing the type of a
6532	     bucket in place. [Tony Finch]
6533
6534	  *) Add generic support for reference-counting the resources used by
6535	     buckets, and alter the HEAP and MMAP buckets to use it. Change
6536	     the way buckets are initialised to support changing the type of
6537	     buckets in place, and use it when setting aside TRANSIENT buckets.
6538	     Change the implementation of TRANSIENT buckets so that it can be
6539	     mostly shared with IMMORTAL buckets, which are now implemented.
6540	     [Tony Finch]
6541