Add about, faq & features shortcuts for mirrors without sqlite

# php.net/about.howtohelp      => php.net/howtohelp
# php.net/faq.databases        => php.net/databases
# php.net/features.file-upload => php.net/file-upload

include/manual-lookup.inc

@@ -51,7 +51,8 @@ function find_manual_page_slow($lang, $keyword)
     // Possible prefixes to test
     $sections = array(
         "", "ref.", "function.", "class.",
-        "feature-", "control-structures.", "language."
+        "feature-", "control-structures.", "language.",
+        "about.", "faq.", "features.", 
     );
 
     // Remove .. for security reasons