v2.2.19 release candidate 2 released

[Timo Sirainen]

http://dovecot.org/releases/2.2/rc/dovecot-2.2.19.rc2.tar.gz
http://dovecot.org/releases/2.2/rc/dovecot-2.2.19.rc2.tar.gz.sig

There were still a bit too many bugs in RC1, so here's RC2. Hopefully this will be stable enough to become v2.2.19 final. Please test now rather than wait for v2.2.19 final, since v2.2.20 is unlikely to arrive anytime soon (unless there are some major problems).

Some fixes since RC1:

 - dict fixes, especially with pgsql
 - virtual plugin crashfixes
 - quota "count" backend fixes
 - lib-http fixes
 - some compiling fixes