[Dovecot-news] v2.0.18 released

[Timo Sirainen]

http://dovecot.org/releases/2.0/dovecot-2.0.18.tar.gz
http://dovecot.org/releases/2.0/dovecot-2.0.18.tar.gz.sig

        + DIGEST-MD5 authentication supports authorization id now.
          Patch by Yubao Liu
        + Added instance_name setting which is used to prefix Dovecot
          processes in ps output.
        - LDA/LMTP: Sending a large mail via submission_host or via LMTP proxy
          may have caused a hang.
        - Fixed dbox + mail_attachment_dir + zlib problems.
        - Login processes weren't logging all intended messages with
          auth_verbose=yes
        - IMAP: THREAD REFS sometimes returned invalid (0) nodes.
        - IMAP: CONTEXT search return option wasn't handled at all.
        - dbox: Various error handling fixes.
        - snarf plugin: Keep the mailbox locked during snarfing to avoid
          duplicates.