added comment about cgi.fix_pathinfo

git-svn-id: svn://svn.lighttpd.net/lighttpd/branches/lighttpd-merge-1.4.x@1017 152afb58-edef-0310-8abb-c4023f1b3aa9

doc/lighttpd.conf

@@ -205,6 +205,7 @@ static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" )
 
 #### fastcgi module
 ## read fastcgi.txt for more info
+## for PHP don't forget to set cgi.fix_pathinfo = 1 in the php.ini
 #fastcgi.server             = ( ".php" =>
 #                               ( "localhost" =>
 #                                 (