Build start notification should be conditioned by configuration with a checkbox.
I believe this patch should do the trick. I'm waiting for Violet to activate my bunny, so I couldn't test it in real conditions.
I took the liberty to get rid of some boilerplate code. Do as you please with this patch.
Thanks to Fred Bricon who provided a patch, I integrated it locally. Expecting to perform a release soon.
Code changed in hudson
User: : ericlemerdy
Fix of JENKINS-4866 and JENKINS-4865