Fix Traceback

Ticket: #4833
Fix error that slipped though.

Ticket: #4836
Fix missing import.

This is cherry-picked from the commit in master that addressed
a bunch of pyflakes warnings, however this import missing
is not innocuous.  It really does break stuff.
I know python, I really do.
Fix typo in help text.

Ticket: #4840
Hello 9.2.1.4.1.
Bugfix: remove the hard set ldap_ssl option
Put py-bonjour in it's place.
Move pam configuration to later on in the AD initialization process
Do not log email error in the console

Ticket:	#4827
(cherry picked from commit 16da23e1399f248b3f5271bd475c14cf0d8c4606)
Don't allow cifs to be stopped while running in DC mode

Ticket: #4843
Temporary bump to 9.2.1.4.2 just for TrueNAS
Remove trailing whitespace.
Remove leading whitespace.
Merge remote-tracking branch 'origin/9.2.1-BRANCH' into feature/hyperv

Conflicts:
	Makefile
	nanobsd/os-base