code by setting r->status temporarily to access_status. r->status might be
different than access_status e.g. r->status could be HTTP_OK if e.g. we
override the error page on the proxy or if the error was not generated by the
backend itself but by the proxy e.g. a bad gateway.

Backports: r1597352
Submitted by: rpluem
Reviewed by: wrowe, ylavic



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As a reference see Wikipedia:
https://en.wikipedia.org/wiki/MPEG-4_Part_14#.MP4_versus_.M4A

Submitted by: Dylan Millikin <dylan.millikin gmail.com>
PR: 57895
Backports: r1723567
Reviewed by: rjung, wrowe, ylavic



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to avoid reusing it should the close be effective after some new request
is ready to be sent.

Backports: r1678763, r1703807, r1703813, r1678763
Submitted by: ylavic
Reviewed by: rpluem, wrowe


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SubstituteInheritBefore on|off directive (with default in 2.2 of 'off)

Backports: r1684900, r1687539, r1687680, r1688331, r1688339, r1688340, r1688343,
           r1697013, r1697015
PR: 57641
Submitted by: 
     [Marc.Stern <Marc.Stern approach.be>, Yann Ylavic, William Rowe]



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While at it, propose another fix for mod_mem_cache relating to PR 43724.


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failures under Visual Studio 2015 and other mismatched MSVCRT flavors.

PR: 59630
Submitted by: Jan Ehrhardt <phpdev ehrhardt.nl>



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Added a specific reference of evaluation order between ProxyPass and RewriteRule directives. Bug: 54158


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Change backported from trunk: Adding more details about environment variables passed to cgi scripts.



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Backport of r1726086 from trunk
resp. r1726087 from 2.4.x.


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