[Dovecot] v2.1.alpha2 released

[Timo Sirainen]

http://dovecot.org/releases/2.1/alpha/dovecot-2.1.alpha2.tar.gz
http://dovecot.org/releases/2.1/alpha/dovecot-2.1.alpha2.tar.gz.sig

This is actually looking rather stable. I'm still calling it "alpha" in
case I think of doing some more API changes, but I think the next one
will be called "beta1", hopefully soon followed by "rc1".

 - Statistics gathering improvements (more fields) and fixes.
 - Lots of imapc fixes and improvements
 - Fixes to handling shared namespaces
 - Several other fixes