TODO

    * Improve completion for pkg_tools
          o Currently nothing listed 
    * Add completion for portmaster
    * Improve portupgrade completion
          o Currently nothing listed 
    * Improve init script */rc.d completion
          o add restart
          o add reload
          o add support for prefix [fast|force|one]
          o add status
          o add poll
          o add rcvar
          o add a way to find extra arguments and automatically add it to completion (need examples scripts)
                + postgresql (initdb)
                + lighttpd (check) 
    * Add completion to zfs/zpool (need to be compared and shared with opensolaris)
          o zpool
          o zfs 
    * Add completion for pw
    * Add completion for cu
    * Add completion for pfctl
    * Add completion for camcontrol
    * Add completion for acpiconf
          o Check the type available from sysctl 
    * Add completion for burncd
    * Add completion for portaudit
    * Improve completion for ifconfig
          o Currently nothing listed