Bug 366152: Trim whitespaces from the URL field

Bugzilla/Bug.pm

@@ -1236,6 +1236,7 @@ sub _check_assigned_to {
 sub _check_bug_file_loc {
     my ($invocant, $url) = @_;
     $url = '' if !defined($url);
+    $url = trim($url);
     # On bug entry, if bug_file_loc is "http://", the default, use an 
     # empty value instead. However, on bug editing people can set that
     # back if they *really* want to.