jenkins testing on 0.20.20x

[Steve Loughran]

If I have some patches for the 0.20.20x branch, how do I submit them so 
they get applied and tested on that branch, rather than trunk. I have a 
patch that I want to get in there, but the JIRA process doesn't like the 
(unappliable to trunk patch). I could get the patch into trunk first and 
backport it, but really you want both branches' patches auto-reviewed