Add PHP as a possible highlighted language if needed.

Fix up the lexer so that when httpdComments is true, httpd style comments are not parsed as such unless the hash character is at the beginning of a line (disregarding spaces)

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1332544 13f79535-47bb-0310-9956-ffa450edef68