Imported Upstream version 2.2.2
Imported upstream bug fix release 2.2.2

Upstream version 2.2.2
Adjust exampledir patch to dovecot 2.2.2
Updated changelog for new release

Git-Dch: Ignore
Remove handling of dovecot-db.conf.ext config file

The dovecot-db.conf.ext example configuration file has been removed upstream
since Berkeley DB supported is never built in. Adjust dovecot-core postinst
and postrm scripts to handle this file only as old config.
Update ChangeLog for new release

Git-Dch: Ignore