FreeNAS Code

Make sure the nut daemons are dead. This closes a potential issue where nut stays up and running even after the service sliders claim things are off.

Don't reimport errno.

Fix zvol deletion with cascade=True and destroy=True so it doesn't traceback.

Clean up an unused import and fix a shadowed declaration.

Fix a typo.

Simplify mntlock acquisition statements and simplify loops.

Determine whether or not a path is owned by a mountpoint by using struct stat data returned by os.stat(..).

Remove unnecessary os imports since it's handled at the top of the module.

Fix the format string I added to volume_detach.

Unbreak changing passwords and other forms that don't have advanced fields.

Mute the add_port noise and add something a bit more meaningful instead if make package-name fails.