Hi, I've created the cyrus-imapd-3.0 branch. Fixes and stuff that need to be in 3.0.x releases should be applied or backported to here.
The master branch is now what will eventually become the 3.1 series. Issues affecting this branch specifically should be labelled "3.1" on github. (There's still some website infrastructure fiddling to be done. Will sort this out once the next 3.0.0 release candidate is up, sometime this afternoon.) Cheers, ellie