mod_cache_disk: Fix potential hangs on Windows when using mod_cache_disk.

PR: 55833
Submitted by: covener
Reviewed by: jim, trawick


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Add support for OpenSSL configuration commands by introducing
the SSLOpenSSLConfCmd directive.

Proposed by: kbrand
Reviewed by: drh, trawick


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    adjust compat info for named capturing groups


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   axe one more case of digest auth being described as secure


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Avoid sending back uninitialized memory, use 'ftpmessage' in order to have something meaningful instead.

Save 8k of stack by the same time.
Submitted by: jailletc36
Reviewed/backported by: jim


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Remove <Proxy ~ wildcard-url> syntax which:
   - is equivalent to <ProxyMatch wildcard-url>
   - has never been documented
   - incorrectly checks parameters (!cmd->path should be !cmd->path[0])
   - is buggy (! is missing in front of strncasecmp)
Submitted by: jailletc36
Reviewed/backported by: jim


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core: Support named groups and backreferences within the LocationMatch,
DirectoryMatch, FilesMatch and ProxyMatch directives.


Documentation for the support of named groups and backreferences.


c89 fix


Add a "MATCH_" prefix to variables set within
LocationMatch/DirectoryMatch/FilesMatch.

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


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mod_authz_user: Support the expression parser within the require directives.

Submitted by: minfrin
Reviewed/backported by: jim


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mod_authnz_host: Support the expression parser within the require directives.

Submitted by: minfrin
Reviewed/backported by: jim


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mod_authnz_groupfile: Support the expression parser within the require directives.


Pass the correct pointer that made it past the test suite.

Submitted by: minfrin
Reviewed/backported by: jim


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mod_authnz_dbm: Support the expression parser within the require directives.


Pass the correct pointer that made it past the test suite.

Submitted by: minfrin
Reviewed/backported by: jim


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mod_authnz_dbd: Support the expression parser within the require directives.


Pass the correct pointer that made it past the test suite.

Submitted by: minfrin
Reviewed/backported by: jim


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mod_authnz_ldap: Support the expression parser within the require
directives.

Submitted by: minfrin
Reviewed/backported by: jim


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    digest auth is only marginally more secure than basic auth.
    Adjust the docs to today's reality.

    mention insecure password storage as pointed out by Graham



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the change to acinclude.m4 (part of r1527294) was left out from the
backport proposal by mistake.

Originally proposed by: kbrand. Reviewed by: jim, jorton (cf. r1542297).


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emphasize that this is mostly just AAA checks and not the status
code of the handler. PR21828 and various dups.




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