* Improve Debian & Ubuntu support.
    * Automatically add a disclaimer to outgoing emails with Amavisd-new +
      alterMIME (v0.3.10). Disabled by default.
    * Add relay_domains & relay_recipient_maps in postfix, used for backup mx.
    * Improve global ldap address book in roundcube, make it search accounts
      which in the same domain.
    * Fix dovecot setting for mysql backend.
    * Update: clamav -> 0.95.2, awstats -> 6.9-2, dovecot -> 1.1.16.
    * Add two more LDAP attributes in iredmail.schema:
      domainMaxListNumber, domainCurrentListNumber.
    * Add missing package vixie-cron & tmpwatch in RHEL/CentOS.
    * Enable anti-spam & anti-virus on Debian & Ubuntu by default. Thanks
      Falador@forum.
    * Add quota warning report tool: tools/dovecot-quota-warning.sh.
    * Update Mail-DKIM to 0.36. Thanks to lidaobing@gmail for ubuntu 8.04 and
      debian lenny packages.
    * Add /extra/ directory for 3rd-party service integration.
    * Improve tools/create_mail_user_OpenLDAP.sh to integrate pureftpd
      schema.
    * Hashed maildir string: hash_domain(), hash_maildir in conf/functions.
    * Flexible storage base directory used to store users' mail data, easy
      to change, useful for large-scale deployment. e.g.:
        Your mail data are all stored in /home/vmail01, but disk storage is
        nearly full, it's easy to make new users use new storage like
        /home/vmail02, /home/vmail03 or whatever:
            - Prevous maildir: /home/vmail01/z/zh/zha/zhang/
            - Current maildir: /home/vmail02/h/hu/hua/huang/
      You can set the storage base directory in either MySQL (column:
      vmail.storagebasedirectory) or OpenLDAP backend (attribute:
      storageBaseDirectory).

      In addition, maildir and user's HOME directory are seperated (maildir
      is $HOME/Maildir/ by default), so that you can integrate more
      applications against LDAP user auth like OpenSSH, FTP service, SugarCRM
      or whatever you want, data stored in disk storage of each service will
      not be mixed.

      For more detail, please refer to this topic:
      http://www.iredmail.org/forum/topic60-whats-new-in-iredmail-ldap-current-20090610.html
    * Add group 'all@domain.ltd' by default for ldap solution.
    * Add 'enabledService=displayedInGlobalAddressBook' for ldap solution,
      used to control mail address displayed in global ldap address book or
      not.