Remove a bunch of things that don't make sense in a CTL universe.

Ticket: #5524
Remove choices that were used by istgt.

Ticket: #5524
Switch target blocksize to a dropdown of allowed choices.

Ticket: #5587
Auto-Commit of i18n data from Pootle
Limit zfs_get_options to filesystem and volume by default

This should fix a slowness in volumes datagrid when you have a lot of
snapshots.

Ticket:	#4737
Finish formatting tables
Merge branch 'master' of gitserver.ixsystems.com:/git/repos/freenas-build/freenas
Test
Nuke build directory that crept in by mistake.
Also simplify the clean rule to just nuke the build directory.
Remove references to istgt.
Fix more tables. Just a few left that aren't rendering properly.
Test the sysctl/loader against the regex, not the value the sysctl/loader contains.

Ticket: #5597
Initial code drop for configurable idmap backends
Deterine idmap type dynamically... the entire purpose for all of this
Merge branch 'feature/idmap'
Remove dead code and fix tdb2
Make the navtree a happy camper
Various catchup fixes.
Includes text to resolve https://bugs.freenas.org/issues/4977.
Start to integrate new features.
Create default entries