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mod_http2: fixed bug in stream shutdown, support for nghttp2 invalid header callback from 1.14.0 and onwards.



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about Last-Modified header handling.
I removed jchampion's vote since it was related to a completely
different solution.



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add [flags] to syntax 

per http://httpd.apache.org/docs/2.4/mod/mod_rewrite.html#comment_5728

split list of flags out of the massive CondPattern list.




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mod_reqtimeout: Fix body timeout disabling for CONNECT requests to avoid
triggering mod_proxy_connect's AH01018 once the tunnel is established.
https://bugzilla.mozilla.org/show_bug.cgi?id=1279483#c9



mod_reqtimeout: follow up to r1754391: fix missing "else".
Submitted by: ylavic
Reviewed/backported by: jim


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ab: add SNI support when available.

ab: follow up to r1750854: put the -I at the right place for apr_getopt().

ab: follow up to r1750854.
Use SNI when available by default, and invert -I logic to now disable it.

ab: follow up to r1750854: some comments and better naming.

ab: follow up to r1750854: still better naming, and a C89 fix.
Submitted by: ylavic
Reviewed/backported by: jim


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mod_dav: follow up to r1746207:  fix typo (missing '/') for closing tag.



mod_dav: making mod_dav.h compile with clang again
Submitted by: ylavic, icing
Reviewed/backported by: jim


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Restore 'HEAD' method as a special case of GET with the common ID
Submitted by: wrowe
Reviewed/backported by: jim


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mod_proxy_fcgi: avoid loops serving proxied error documents

This commit should solve the issue indicated in PR 55415.
Httpd loops while serving a error document if:
1) The error document's content is proxied.
2) ProxyErrorOverride is set.
The solution proposed is to limit the use of ap_die only
to the initial request. I tested the change with very basic
scenarios but I am not sure if I got all the use cases,
feedback is really welcome.


Submitted by: elukey
Reviewed/backported by: jim


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Force mod_proxy_fcgi to read the whole FCGI response 
even when the content has not been modified (HTTP 304).

The problem is described in PR 59838. This patch should 
avoid bogus reads causing the following issues with
HTTP 304 responses:
- AH01068: Got bogus version X, expected 1
- AH01069: Got bogus rid X, expected 1
- AH01075: Error dispatching request to :
- HTTP 503 logged instead of 304 (even if the external 
  client gets correctly a 304)

As discussed on IRC the HTTP_PRECONDITION_FAILED use case
should be handled like the HTTP_NOT_MODIFIED one but it will
be done in a separate commit.


Submitted by: elukey
Reviewed/backported by: jim


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Fix spelling in comments and text files.
No functional change.
PR 59990

Submitted by: rjung
Reviewed/backported by: jim


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merge of 1752145,1753498,1753541,1754129,1754414,1754534,1755323,1756844,1757524,1757534,1757540 from trunk

mod_http2: backport of latest changes
 - intermediate responses
 - graceful shutdown of connections
 - ht debug draft update



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PR60024 cleanups around per-dir processing/redundancy/terminology.



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Remove some trailing spaces to synch with trunk

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* Prevent redirect loops between workers within a balancer by limiting the
  number of redirects to the number balancer members.

PR: 59864

Submitted by: rpluem
Reviewed by: rpluem, jim, ylavic


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* Do not overwrite r->status with access_status if access_status is OK or DONE
  as in this case r->status might contain the true response code.

PR: 59869

Submitted by: rpluem
Reviewed by: rpluem, jim, ylavic


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mod_dav: Add dav_begin_multistatus, dav_send_one_response,
dav_finish_multistatus, dav_send_multistatus, dav_handle_err, 
dav_failed_proppatch, dav_success_proppatch to mod_dav.h.

Submitted by: minfrin
Reviewed by: minfrin, jim, ylavic


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mod_dav: Add support for childtags to dav_error.

Submitted by: minfrin
Reviewed by: minfrin, jim, ylavic


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httpoxy workarounds, first draft patch as published for all 2.2.x+ sources

Optimization to httpoxy workaround, for 2.4.23+ only.

Submitted by: Dominic Scheirlinck <dominic vendhq.com>, ylavic
Reviewed/backported by: wrowe, jim, ylavic


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