Small performance optimization for find_end_sequence(): when we find

the start of a directive, scan through the rest of it in a minimal
loop before popping back out to the main char-at-a-time parser loop


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94153 13f79535-47bb-0310-9956-ffa450edef68