FreeNAS Code

move final bits for cronjob from services to system

Promote feedback to trunk.

split ldap and ad restart to stop and start

remove all wildcard imports; fix periodic snapshots template

remove tons of unused imports and unused variables

PEP8 compliant; remove legacy unused code; bugfixes
Special thanks to Chyssler for pointing them out

remove all @login_required decorators as complement of r5932

remove legacy django.views.generic and related code;
fix some imports

remove legacy code for services app, unused imports

Giant rollup commit in preperation for 8.0-RC4