Remove apr_brigade_flatten(), buffering and duplicated code from
the HTTP_IN filter, parse chunks in a single pass with zero copy.

Limit accepted chunk-size to 2^63-1 and be strict about chunk-ext
authorized characters.

Submitted by: graham, ylavic
Reviewed by: ylavic, wrowe, jim
Backports: 1484852, 1684513
Reported by: Régis Leroy



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   * mod_deflate: Add missing APLOGNO.

Submitted by: ylavic
Reviewed by: jailletc36, gsmith, druggeri
Backported by: jailletc36

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Turn some tabs into space.
Remove some useless <br /> in <highlight> blocks. (this was causing some additionnal blank lines at the end of some examples)

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mod_proxy_scgi upgraders likely need to set proxy-scgi-pathinfo


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initialize args to not print garbage mem during a RewriteRule parse error



Initialize args to not print garbage mem during a RewriteCond parse error (same as r1681795 for RewriteRule)

Improve style in examples.

Improve error message (related to PR57311 diagnostic)

Concat string at compile time in order to save a few cycles.

Submitted by: covener, jailletc36, jailletc36, jailletc36, jailletc36
Reviewed/backported by: jim


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mod_proxy: Don't put the worker in error state for 500 or 503 errors
returned by the backend unless failonstatus is configured to.  PR 56925.


mod_proxy: follow up to r1681694.

Handle the proxy-error-override note also in mod_proxy_ajp.

The note is not needed in mod_proxy_fcgi (which also handles
ProxyErrorOverride) since it calls ap_die() by itself, and always
returns OK to proxy_handler().

Add a comment about the note where used.

Submitted by: ylavic
Reviewed/backported by: jim


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Backport of r1682937 from trunk.


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Backport of r1682923 from trunk.


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Style (mostly indent)
remove a useless local variable initialization

More style

Constify + save a few bytes in conf pool (+ some minor space adjustments)

Save a few bytes in conf pool and axe a function that duplicates 'ap_set_string_slot'

Save a few bytes in conf pool
Submitted by: jailletc36
Reviewed/backported by: jim


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PR 57968: Don't lowercase the argument to SetHandler if the handler is
proxy:unix.


Submitted by: covener
Reviewed/backported by: jim


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handler or input filter already did it while reading the request (causing
a double response body).

Submitted by: ylavic
Backports: r1482522 (partial, ap_map_http_request_error() things only!),
           r1529988, r1529991, r1643537, r1643543, r1657897, r1665625, 
           r1665721, r1674056
Reviewed by: ylavic, minfrin, wrowe




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