Update to 2.8.0

With this version the dovecotauth patch has been integrated upstream.


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@374702 35697150-7ecd-e111-bb59-0022644237b5
Pull another patch from Red Hat, to fix a runtime crash:

  PANIC: unprotected error in call to Lua API (attempt to index a nil value)

PR:		195240
Red Hat bug:	https://bugzilla.redhat.com/show_bug.cgi?id=1045632
Patch by:	Chris Rankin (Comments 13-16)
Obtained from:	celestia-1.6.1-15.fc20.src.rpm


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@374703 35697150-7ecd-e111-bb59-0022644237b5