[Dovecot] 0.99.13-rc1

http://dovecot.org/rc/

I guess the RCing in 0.99.12 didn't help that much. SQL/LDAP authentication crashed because memory was freed wrong. Please test so it would actually work in 0.99.13.

Also fixed SEARCH UNKEYWORD which wasn't working.

Also added 1.0-test's oe-ns-eoh POP3 workaround built-in.