Bug 383520 ��� Need to hook code-error.html.tmpl

Patch by ghendricks r=mkanat a=mkanat

webtools/bugzilla/template/en/default/global/code-error.html.tmpl

@@ -426,12 +426,18 @@
     Invalid setting for post_bug_submit_action
 
   [% ELSE %]
+    [%# Try to find hooked error messages %]
+    [% error_message = Hook.process("errors") %]
+    [% IF NOT error_message %]
       [% title = "Internal error" %]
       An internal error has occurred, but [% terms.Bugzilla %] doesn't know
       what <code>[% error FILTER html %]</code> means.
 
       If you are a [% terms.Bugzilla %] end-user seeing this message, please save
       this page and send it to [% Param('maintainer') %].
+    [% ELSE %]
+      [% error_message FILTER none %]
+    [% END %]
   [% END %]
 [% END %]