Log Message:
Update to dovecot-1.0rc11.  From the release announcement mail:

Hopefully the last RC release? As far as I know there are no major
problems left now. If nothing big shows up, v1.0 should be out in a
couple of weeks.

	* Renamed default_mail_env to mail_location. default_mail_env still
	  works for backwards compatibility.
	* deliver: When sending rejects, don't include Content-Type in the
	  rejected mail's headers.
	* LDAP changes:
            * If auth binds are used, bind back to the default dn before doing
	      a search. Otherwise it could fail if a user gave an invalid
	      password.
	    * Initial binding at connect is now done asynchronously.
	    * Use pass_attrs even with auth_bind=yes since it may contain
	      useful non-password fields.

	+ passdb checkpassword: Give TCPLOCALIP and TCPREMOTEIP and PROTO=TCP
	  environments to the checkpassword binary so we're UCSPI (and vchkpw)
	  compatible.
	- mbox handling was a bit broken in rc10
	- Using Dovecot via inetd kept crashing dovecot master
	- deliver: Don't crash with -f "". Changed the default from envelope
	  to be "MAILER-DAEMON".
	- INBOX wasn't shown with LSUB command if only prefixed namespaces
	  were used.
	- passdb ldap: Reconnecting to LDAP server wasn't working with
	  auth binds.
	- passdb sql: Non-plaintext authentication didn't work
	- MySQL passdb ignored all non-password checks, such as allow_nets
	- trash plugin was broken