FreeNAS Code

Add users and groups needed by AFP

FilteringSelect is what we wanted, not ComboBox

change netcli to delete an interface configuration

change NICChoices to optionally show configured interfaces

fixes for zfs add

Add a hack to support attaching disk to existing zpool.

Add service definitions for AFP to avahi

verify existent volume name for UFS;
pass the argument necessary in the backend for "stacked" ZFS

make middleware init() accept *args and **kwargs for future purposes

use ComboBox dojo widget for users/groups