mailbox referrals in 2.4.12

[Andrew Morgan]

In my test cyrus murder environment, which has frontends running 2.4.12, I 
am still seeing mailbox referrals when I have 
proxyd_disable_mailbox_referrals: 1 set in imapd.conf.  Apparently this 
was reported back in 2010:

   http://lists.andrew.cmu.edu/pipermail/info-cyrus/2010-November/034092.html

It sounds like the original 2.3 patch wasn't ported forward to 2.4.

Does anyone have a patch for this against 2.4?  The code is different 
enough in 2.4 that the original 2.3 patch would need some work.

Thanks,
 	Andy