XigmaNAS better support for VNET jails

[tschettervictor]

The current implementation of the cbsdjail extension is not really usable. I’m running into some walls.
My preferred method of creating jails is

1. Create a bridge on the hosr
2. Assign the IP of the host to the bridge
3. Create a VNET jail that links to the newly created bridge.

Unfortunately I can’t really make any headway using the GUI to do the above as it seems more geared towards NAT jails.

Any advise?