Save some cycle.

There is no need to copy, strchr, strcmp and modify a string which is only used for TRACE2 logging.

Note that the code that looks similar a few lines below can not be optimized the same way because it is also returned in 'pmessage'.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1838318 13f79535-47bb-0310-9956-ffa450edef68