FreeNAS Code

Previous commit wasn't fully vetted for PEP8 compliance and for the most part was unnecessary (vimdiff was showing more context changes and I was a bit hasty with the commit hammer).

Requested-by: zippybr

Move code around so it conflicts less when importing into the iX repo.

Do-Not-Merge: in effect in iX repo.

Hackity hack to make webshell communication under unix socket using XML-RPC

This should address the security issue of the previous commit related to webshell.
There is still a lot to do but thats a good start working version.

Let the webshell recover from fail via timeout (restart daemon)

Move webshell to a standalone daemon.

This is a simple move, communication done vi XML-RPC.
There is a lot of room for improvement, this is a commit progress.
Also fix the SIGHUP (Ctrl-C) for webshell.

Show IP/Port of server side being used to connect through the GUI.

Requested-in: #1238

Prevent cache for the webshell, this fixes the issue for IE9

Rework the shutdown/reboot logic a little bit.

Since the introduction of the passwordless login for a fresh install,
people have been able to reboot/shutdown machines by realoding the page.
For fix this issue let's grant a one-time reboot/shutdown license using
sessions through the confirmation dialog.
While I'm here letschange it to try reach the httpd every 3 seconds after
reboot/shutdown and if that goes well redirect to '/'.

Rename "loaders" to "tunables"

Make From email required
Verify form fields before send test mail, use transactions so it is not required to save before use send test mail