Fix APR 1.4 compatibility by avoiding use of apr_escape.h.

Submitted by: jorton
Reviewed by: jorton, rpluem, ylavic


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PR62190 



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merge r1836095 from trunk:
* using the, hopefully correct, ever elusive libressl version numbering check for the new openssl API calls, fixes PR 62548.



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Rebuild (with 8 bits characters replaced by their HTML entities because -Xbootclasspath/p option disabled in build.sh script because it is no more supported in openjdk 10)


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Review by popcorner with further edits for clarity by both CodeingBoy
and popcorner, their discussion at https://github.com/popcorner/chect/pull/1

Added CONTENT_LANGUAGE variable for both translations.

Note user-visible update in CHANGES



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Render <code> in bold in man pages, matching commonly used style in
both help2man and the standard DocBook XSL stylesheets for man output.



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r1494157 from eventopt for event, per sf's review comments.

use a subpool of pchild since skiplist allocations will
happen across threads and are only protected from
other skiplist operations.




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global ap_server_conf must be reset when process->pconf is cleared

Submitted by: covener
Reviewed by: covener, rpluem, ylavic


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Add missing bits from previous backport.


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