[Dovecot] v2.1.7 released

[Timo Sirainen]

http://dovecot.org/releases/2.1/dovecot-2.1.7.tar.gz
http://dovecot.org/releases/2.1/dovecot-2.1.7.tar.gz.sig

	* Session ID is now included by default in auth and login process
	  log lines. It can be added to mail processes also by adding
	  %{session} to mail_log_prefix.

	+ Added ssl_require_crl setting, which specifies if CRL check must
	  be successful when verifying client certificates.
	+ Added mail_shared_explicit_inbox setting to specify if a shared INBOX
	  should be accessible as "shared/$user" or "shared/$user/INBOX".
	- v2.1.5: Using "~/" as mail_location or elsewhere failed to actually
	  expand it to home directory.
	- dbox: Fixed potential assert-crash when reading dbox files.
	- trash plugin: Fixed behavior when quota is already over limit.
	- mail_log plugin: Logging "copy" event didn't work.
	- Proxying to backend server with SSL: Verifying server certificate
	  name always failed, because it was compared to an IP address.