Add a hydra.conf option to enable email notification

Note that it's disabled by default.

src/root/edit-jobset.tt

@@ -130,7 +130,7 @@
     <div class="control-group">
       <div class="controls">
         <label class="checkbox">
-          <input type="checkbox" name="enableemail" [% IF jobset.enableemail; 'checked="checked"'; END %]/>Email notification
+          <input type="checkbox" name="enableemail" [% IF jobset.enableemail; 'checked="checked"'; END %] [%IF !emailNotification%]disabled=1[%END%] />Email notification
         </label>
       </div>
     </div>
@@ -138,7 +138,7 @@
     <div class="control-group">
       <label class="control-label">Email override</label>
       <div class="controls">
-        <input type="text" class="span3" name="emailoverride" [% HTML.attributes(value => jobset.emailoverride) %]/>
+        <input type="text" class="span3" name="emailoverride" [% HTML.attributes(value => jobset.emailoverride) %] [%IF !emailNotification%]disabled=1[%END%] />
       </div>
     </div>
 

src/root/jobset.tt

@@ -148,6 +148,7 @@
         <th>Scheduling shares:</th>
         <td>[% jobset.schedulingshares %] [% IF totalShares %] ([% f = format("%.2f"); f(jobset.schedulingshares / totalShares * 100) %]% out of [% totalShares %] shares)[% END %]</td>
       </tr>
+      [% IF emailNotification %]
       <tr>
         <th>Enable email notification:</th>
         <td>[% jobset.enableemail ? "Yes" : "No" %]</td>
@@ -156,6 +157,7 @@
         <th>Email override:</th>
         <td>[% HTML.escape(jobset.emailoverride) %]</td>
       </tr>
+      [% END %]
       <tr>
         <th>Number of evaluations to keep:</th>
         <td>[% jobset.keepnr %]</td>