Timo seems to be releasing rc-s at a bit different URL so simple ebuild renaming doesn't work so far. http://dovecot.org/pipermail/dovecot-news/2014-May/000272.html I guess the ebuild could check for "rc" and/or other standard atoms in the ebuild file name and do some URL tweak magic? Reproducible: Always
Done for net-mail/dovecot-2.2.12 without a revbump. Thanks for the report.