FreeNAS Code

Fix syntax error

Preserve zfs cachefile through cd upgrades

Preserve user installed kernel modules through upgrades

Preserve root ssh keys across upgrades

Roll up commit from ix repo

sync with ix repo, brings a whole raft of improvements to FreeNAS

Mega commit to merge with internal repo, adds AD, LDAP, ssh keys in database, improves migrations, and much much more

Extremely crude attempt to support upgrades.

Two minor tweaks to the installer to make it clearer that the commit dialog is your last chance to bail.

Cleanup templates