Make the lexer only highlight enclosures in config syntax if they are whole...

Make the lexer only highlight enclosures in config syntax if they are whole words, and update to also recognize FilesMatch, LocationMatch, Limit etc.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1330241 13f79535-47bb-0310-9956-ffa450edef68