Fix crontab generation for rsync tasks.

Ticket: #4053

In addition the user field wasn't hooked up to anything.
Parallelize the different architecture builds
Merge branch 'master' of gitserver.ixsystems.com:/git/repos/freenas-build/freenas
Also script truenas builds.
Check full path when doing path comparisons

Ticket: #4048
Change favicon

Ticket:	#4023
Silent ix-crontab error if there are no custom scripts

Ticket:	#4068
Fix tree state save

Ticket:	#4063
Add missing DomainController import

While I'm here be more specific about what exception to catch so those
kind of errors dont go unnoticed again.

Ticket:	#4062
UnboundLocalError in plugin install since simpejson deprecation

Ticket:	#4072
Need full paths for these.
Fix separator for scrub tasks

Ticket:	#4073
Add missing TCP_OFFLOAD option back into FreeNAS.
setup_environ no longer exists, this fixes email alerts

Ticket:	#4067
Merge remote-tracking branch 'origin/master' into feature/hyperv