Backport of r1842639 from trunk.


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apportion blame/credit widely.


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before signals handling to avoid lifetime issues on restart or shutdown.
PR 62658.
trunk patch: http://svn.apache.org/r1835845
             http://svn.apache.org/r1835846
             http://svn.apache.org/r1837354
             http://svn.apache.org/r1837356
             http://svn.apache.org/r1839571
             http://svn.apache.org/r1839583
2.4.x patch: http://home.apache.org/~ylavic/patches/2.4.x-mpms_async_objects_lifetime.patch
+1: ylavic, jim (but not for 2.4.35), minfrin


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trunk: http://svn.apache.org/r1839946
       http://svn.apache.org/r1839920
       http://svn.apache.org/r1833589
       http://svn.apache.org/r1833588
       http://svn.apache.org/r1828723
       http://svn.apache.org/r1828720
       http://svn.apache.org/r1828222
       http://svn.apache.org/r1827992
       http://svn.apache.org/r1827924
       http://svn.apache.org/r1827912
       http://svn.apache.org/r1828790
       http://svn.apache.org/r1828791
       http://svn.apache.org/r1828792
       http://svn.apache.org/r1840585
       http://svn.apache.org/r1840710
       http://svn.apache.org/r1841218
2.4.x branch: svn merge ^/httpd/httpd/branches/tlsv1.3-for-2.4.x


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On the trunk:

 * silencing gcc uninitialized warning
 * refrainning from apr_table_addn() use since pool debug assumptions are in conflict
 * adding more assertions
 * copy-porting changes to base64 encoding code from mod_md


Submitted by: icing
Reviewed by: icing, minfrin, jim


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Style only

Be more consistent:
   - add space between (if|while) and \(
   - place of 'break ' statement

Fix cut and paste typo in error message + remove empty lines to be consistent

follow-up to r1656549.

Instead of logging a password (which is not a good practice), clarify the associated message

* Silence compiler warning

Be less tolerant when parsing the credencial for Basic authorization. Only spaces  should be accepted after the authorization scheme. \t are also tolerated.

The current code accepts \v and \f as well.

The same behavior is already used in 'ap_get_basic_auth_pw()' which is mostly the same function as 'get_basic_auth()'.

Function used as 'apr_reslist_destructor' when calling 'apr_reslist_create()' should have the following prototype:

apr_status_t (*apr_reslist_destructor)(void *resource, void *params, apr_pool_t *pool);
Submitted by: jailletc36, rpluem, jailletc36, jailletc36
Reviewed by: jailletc36, minfrin, jim


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Fix missing spaces in messages
Submitted by: jailletc36
Reviewed by: jailletc36, minfrin, jim


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trunk patch: http://svn.apache.org/r1838937
2.4.x patch: svn merge -c 1838937 ^/httpd/httpd/trunk .
+1: jim, ylavic, minfrin


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trunk patch: http://svn.apache.org/r1840582
2.4.x patch: svn merge -c 1840582 ^/httpd/httpd/trunk .
+1: jim, ylavic, minfrin


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trunk patch: http://svn.apache.org/r1836276
2.4.x patch: svn merge -c 1836276 ^/httpd/httpd/trunk .
+1: jim, ylavic, minfrin


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trunk: http://svn.apache.org/r1837225
       http://svn.apache.org/r1837366
2.4.x patch: http://home.apache.org/~jim/patches/client64v2.patch
+1: jim, icing (by inspection), minfrin


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* modules/ssl/ssl_engine_kernel.c (ssl_check_post_client_verify):
  Retrieve and set sslconn->client_cert here for both "modern" and
  classic access control.
  (ssl_hook_Access_classic, ssl_hook_Access_modern, ssl_hook_Access):
  Restore SSLRequire and FakeBasicAuth checks to ssl_hook_Access so tests
  are still applied for TLSv1.3.



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