Merge r1584884 from trunk:

Do not scan past the end of the buffer.
If no terminating delimiter is found, just leave things as it is
Submitted by: jailletc36
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1587692 13f79535-47bb-0310-9956-ffa450edef68