Merge r1572655, r1572663, r1572668, r1572669, r1572670, r1572671, r1573224, r1586745, r1587594, r1587639, r1590509 from trunk.


Commit 1 on 6 to fix reentrance (incomplete Zlib header or validation bytes) in mod_deflate's output and input filters.
PR 46146 (patches from duplicated PR 55666)

Handle Zlib header buffering in the inflate output filter :
- add the new deflate_ctx_t fields needed to re-enter the Zlib header parsing,
- introduce the new consume_zlib_flags() function to parse/consume the ZLib flags (will be used by the other filters too),
- use it to handle incomplete header in the output filter (deflate).

This alone fixes PR 55666, but the issue remains for PR 46146 (inflate/deflate input filters), hence the following patches.


Commit 2 on 6 to fix reentrance (incomplete Zlib header or validation bytes) in mod_deflate's output and input filters.
PR 46146 (patches from duplicated PR 55666)

Handle Zlib header buffering in the inflate input filter :
- loop until all the header is received,
- handle non blocking reads returning empty brigade,
- fix a double ap_get_brigade() when an EOS brigade is encountered while reading the header,
- in that case and no data was received so far, don't return an error but SUCCESS with the EOS, otherwise fail,
- don't remove the Content-Length and Content-MD5 headers until some data is read.

Still does not handle Zlib flags for now, next commits.


Commit 3 on 6 to fix reentrance (incomplete Zlib header or validation bytes) in mod_deflate's output and input filters.
PR 46146 (patches from duplicated PR 55666)

Handle Zlib validation bytes buffering (CRC + length) in the inflate input filter :
- use validation_buffer and validation_length as state,
- loop until all the bytes are received.


Commit 4 on 6 to fix reentrance (incomplete Zlib header or validation bytes) in mod_deflate's output and input filters.
PR 46146 (patches from duplicated PR 55666)

Handle non blocking reads which would block in the inflate input filter (not an error).


Commit 5 on 6 to fix reentrance (incomplete Zlib header or validation bytes) in mod_deflate's output and input filters.
PR 46146 (patches from duplicated PR 55666)

Handle Zlib flags in the inflate input filter as in the output filter, using consume_zlib_flags().


Commit 6 on 6 to fix reentrance (incomplete Zlib header or validation bytes) in mod_deflate's output and input filters.
PR 46146 (patches from duplicated PR 55666)

Ignore empty buckets and split buckets longer than INT_MAX (since zlib uses 32-bit ints only) in all filters.


mod_deflate: when consuming zlibs flags, APR_INCOMPLETE implies no more bytes available.


mod_deflate: update empty log tags.


mod_deflate: Delay INFLATE input filter's self removal until all the buffered
             buckets are out (including EOS). PR 46146.


mod_deflate: Don't return gzip-ed data when reading FLUSH bucket in INFLATE
             input filter, forward the FLUSH but keep reading should EOS/more
             follow (should not happen, but mod_deflate won't fix it).


mod_deflate: follow up to r1587639.
Don't break the looped brigade when moving the FLUSH bucket to the returned bb
and continue reading.



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Follow up r1573626 with some wordsmithing, a compatibility note,
and indentation.


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mod_proxy: Allow reverse-proxy to be set via explicit handler.

Submitted by: ryo takatsuki <ryotakatsuki gmail com>
Reviewed by: ylavic, jim, mrumph


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ab: support custom HTTP method with -m argument.

PR: 56604
Submitted by: Roman Jurkov <winfinit gmail.com>
Reviewed by: ylavic, trawick, covener

(r1601680 and r1601700 not reflected in mergeinfo due to
a collision with an unrelated trunk change)


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mod_proxy_fcgi: better error messages, and fix an old bug where the error
                condition was forgotten

Submitted by: trawick
Reviewed by: ylavic, covener


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promotions


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- IVM changed to use shm
- More verbose error logging (no functional change)
- Miscellaneous refactoring that was in trunk but not in 2.4.x (no functional change as such)

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Stray whitespace (r1602730 in trunk)

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core: avoid a double apr_time_now() call on the first succeeding read.

* Correctly escape user provided data.

PR: 56532
Submitted by: Maksymilian <max cert.cx>
Reviewed by: rpluem


Save a few bytes of memory. This can be done in temp_pool.

Fix layout

don't pass uninitialized rv passed to ap_log_rerror()
  (rv wasn't interesting / follow an existing example)

stop throwing away a pointer on the heap

(clang scan-build)


add the URI to DEBUG message 00765 (and drop an exclamation point):

  Cache provider's store_body failed!



Doxygen fix + reorg to match how other header files are built
Submitted by: ylavic, rpluem, jailletc36, jailletc36, trawick, covener, jailletc36
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1603141 13f79535-47bb-0310-9956-ffa450edef68

Fix bug introduced in r1591508 which resulted in the final empty
FCGI_STDIN not being sent.  Interaction with latest uWSGI (and
probably other protocol implementations) breaks without this.


Reindent after small fix in r1603027


mod_proxy_fcgi: follow up to r1592032.

Also break the outer loop when "sending stdin" fails.

Submitted by: trawick, ylavic
Reviewed/backported by: jim


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you do it wrong.


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(simply copy from trunk except revision ref)


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