[Dovecot] v2.1.0 released

[Timo Sirainen]

http://dovecot.org/releases/2.1/dovecot-2.1.0.tar.gz
http://dovecot.org/releases/2.1/dovecot-2.1.0.tar.gz.sig

Here's finally the the stable v2.1 release. I expect this release to be quite stable, since it's already being used in several large installations.

Changes since rc7: FS layout related crashfix, two man pages added.

The biggest changes since v2.0:

	* Plugins now use UTF-8 mailbox names rather than mUTF-7:
	  acl, autocreate, expire, trash, virtual
	* auth_username_format default changed to %Lu. If you really want
	  case sensitive usernames, set it back to empty.
	* Solr full text search backend changed to use mailbox GUIDs instead of
	  mailbox names, requiring reindexing everything. solr_old backend can
	  be used with old indexes to avoid reindexing, but it doesn't support
	  some newer features.
	* Expire plugin: Only go through users listed by userdb iteration.
	  Delete dict rows for nonexistent users, unless
	  expire_keep_nonexistent_users=yes.
	* Temporary authentication failures sent to IMAP/POP3 clients
	  now includes the server's hostname and timestamp. This makes it
	  easier to find the error message from logs.
	* dsync was merged into doveadm. There is still "dsync" symlink
	  pointing to "doveadm", which you can use the old way for now.
	  The preferred ways to run dsync are "doveadm sync" (for old "dsync
	  mirror") and "doveadm backup".

	+ imapc (= IMAP client) storage allows using a remote IMAP server to
	  be used as storage. This allows using Dovecot as a smart (caching)
	  proxy or using dsync to do migration from remote IMAP server.
	+ Mailbox indexing via queuing indexer service (required for Lucene)
	+ Lucene full text search (FTS) backend rewritten with support for
	  different languages
	+ FTS finally supports "OR" search operation
	+ FTS supports indexing attachments via external programs
	+ IMAP FUZZY extension, supported by Lucene and Solr FTS backends
	+ IMAP SPECIAL-USE extension to describe mailboxes
	+ Mailbox list indexes
	+ Statistics tracking via stats service. Exported via doveadm stats.
	+ Autocreate plugin creates/subscribes mailboxes physically only when
	  the mailbox is opened for the first time. Mailbox listing shows the
	  autocreated mailboxes even if they don't physically exist.
	+ Password and user databases now support default_fields and
	  override_fields settings to specify template defaults/overrides.
	+ SCRAM-SHA-1 authentication mechanism by Florian Zeitz
	+ LDAP: Allow building passdb/userdb extra fields from multiple LDAP
	  attributes by using %{ldap:attributeName} variables in the template.
	+ Improved multi-instance support: Track automatically which instances
	  are started up and manage the list with doveadm instance commands.
	  All Dovecot commands now support -i <instance_name> parameter to
	  select the instance (instead of having to use -c <config path>).
	  See instance_name setting.
	+ auth: Implemented support for Postfix's "TCP map" sockets for
	  user existence lookups.
	- listescape plugin works perfectly now