v2.2.22 released

http://dovecot.org/releases/2.2/dovecot-2.2.22.tar.gz http://dovecot.org/releases/2.2/dovecot-2.2.22.tar.gz.sig

• Added doveadm HTTP API: See http://wiki2.dovecot.org/Design/DoveadmProtocol/HTTP
• virtual plugin: Mailbox filtering can now be done based on the mailbox metadata. See http://wiki2.dovecot.org/Plugins/Virtual
• stats: Added doveadm stats reset to reset global stats.
• stats: Added authentication statistics if auth_stats=yes.
• dsync, imapc, pop3c & pop3-migration: Many optimizations, improvements and error handling fixes.
• doveadm: Most commands now stop soon after SIGINT/SIGTERM.

• auth: Auth caching was done too aggressively when %variables were used in default_fields, override_fields or LDAP pass/user_attrs. userdb result_* were also ignored when user was found from cache.
• imap: Fixed various assert-crashes caused v2.2.20+. Some of them caught actual hangs or otherwise unwanted behavior towards IMAP clients.
• Expunges were forgotten in some situations, for example when pipelining multiple IMAP MOVE commands.
• quota: Per-namespaces quota were broken for dict and count backends in v2.2.20+
• fts-solr: Search queries were using OR instead of AND as the separator for multi-token search queries in v2.2.20+.
• Single instance storage support wasn't really working in v2.2.16+
• dbox: POP3 message ordering wasn't working correctly.
• virtual plugin: Fixed crashes related to backend mailbox deletions.