core: deregister all hooks before leaving pconf, otherwise some late cleanup
or function call (e.g. ap_log) may use one while DSOs are unloaded.

See PR 61558 (double/second fault).


core, MPMs unix: follow up to r1809881.

Deregister all hooks first (in pre_cleanup), by doing it last we could still
have had them run when DSOs were unloaded.

Likewise, avoid double faults when handling fatal signals by restoring the
default handler before pconf is cleared (we can't ap_log_error there).

Finally, we need to ignore sig_term/restart (do nothing) when the main
process is exiting (i.e. ap_pglobal is destroyed), since retained_data are
freed.

Aimed to fix all faults in PR 61558.


MPMs unix: follow up to r1809881 and r1809973.

unset_signals() is called when ap_pglobal is destroyed too.


Follow up to r1809881: CHANGES entry.


Reviewed by: ylavic, jim, covener


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No need to reset Stefan\'s vote I guess...


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Backport of r1820101 from trunk plus year
update in docs/manual/style/xsl/common.xsl.


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merge of 1804530,1804531,1805186,1806939,1807232,1808122 from trunk.

Backport of mod_md support in mod_ssl.



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Fix upgrading examples

 - providers are case sensitive
 - description didn't match example / 2.2 didn't match 2.4.

Submitted by: Hank Ibell
Committed by: covener




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PR#56457 included.


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core: silently ignore a not existent file path when IncludeOptional
     is used.

In https://bz.apache.org/bugzilla/show_bug.cgi?id=57585 some use cases
were reported in which IncludeOptional seems to be too strict in its
sanity checks.

This change is a proposal to relax IncludeOptional checks to silently
fail when a file path is not existent rather than returning SyntaxError.

Submitted by: elukey
Reviewed by: elukey, jim, niq


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event: better apr_pollset_add() failure handling to avoid an (very unlikely)
worker vs listener race condition.



Follow up to r1809273: CHANGES entry.


Submitted by: ylavic
Reviewed by: ylavic, jim, covener


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clarify/reword RegisterHTTPMethod and add some seealso's





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Suggest other commits for this backport

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withdrawl proposal of blocking confusing non-global DEFINE



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