Backport to v2.4:

Backport to v2.4:

  *) core: Add formats %{z} and %{strftime-format} to ErrorLogFormat, and make
     sure that if the format is configured early enough it applies to every log
     line.  PR 62161.
     trunk patch: https://svn.apache.org/r1908380
                  https://svn.apache.org/r1908383
                  https://svn.apache.org/r1908384
                  https://svn.apache.org/r1908388
                  https://svn.apache.org/r1908389
                  https://svn.apache.org/r1908390
                  https://svn.apache.org/r1908393
                  https://svn.apache.org/r1908394
                  https://svn.apache.org/r1908406
                  https://svn.apache.org/r1908407
                  https://svn.apache.org/r1908556
                  https://svn.apache.org/r1908557
     2.4.x patch: svn merge -c 1908380,1908383-1908384,1908388-1908390,1908393-1908394,1908406-1908407,1908556-1908557 ^/httpd/httpd/trunk .
                  (merge works modulo MMN, or patch/PR below)
                  https://patch-diff.githubusercontent.com/raw/apache/httpd/pull/350.diff
                  https://github.com/apache/httpd/pull/350
     +1: ylavic, rpluem, minfrin

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1911079 13f79535-47bb-0310-9956-ffa450edef68