Merge r1784318 from trunk:

 Support use of optional "tag" in syslog entries. Streamline the patch.
 PR 60525.

Submitted by: jim
Reviewed by: rpluem, jim, mrumph


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1807707 13f79535-47bb-0310-9956-ffa450edef68