--- wiki.pl	2009-08-15 17:42:13.000000000 +0200
+++ larpwiki-more-config-options.pl	2009-08-15 17:42:02.000000000 +0200
@@ -314,10 +314,10 @@
   #   5.  A $FS (field separator) character    (kept in output)
   #   6.  A double double-quote ("")           (removed from output)
   $UrlProtocols = "http|https|ftp|afs|news|nntp|mid|cid|mailto|wais|"
-                  . "prospero|telnet|gopher";
+                  . "prospero|telnet|gopher" unless $UrlProtocols;
   $UrlProtocols .= '|file'  if ($NetworkFile || !$LimitFileUrl);
   $UrlPattern = "((?:(?:$UrlProtocols):[^\\]\\s\"<>$FS]+)$QDelim)";
-  $ImageExtensions = "(gif|jpg|png|bmp|jpeg|ico|tiff?)";
+  $ImageExtensions = "(gif|jpg|png|bmp|jpeg|ico|tiff?)" unless $ImageExtensions;
   $RFCPattern = "RFC\\s?(\\d+)";
   $ISBNPattern = "ISBN:?([0-9- xX]{10,})";
   $UploadPattern = "upload:([^\\]\\s\"<>$FS]+)$QDelim";