SATOH Fumiyasu:

  * Remove a cache entry on close if file was modified
  * Replace own "stupid" result cache implementation with
    Samba memcache implementation
  * Support other anti-virus engines:
    * External command
    * ... and so on
  * Extend quarantine options:
    * quarantine keep tree = yes
    * quarantine keep name = yes
    * quarantine suffix = .infected
  * Support "rename" action:
    * svf-*:infected file action = rename
    * svf-*:rename prefix = svf.
    * svf-*:rename suffix = .infected
  * More test cases
  * Documentation

