Update sysctl.py

Bugs fixed for the test conditions:
1. Corrected if-else logic, for already correct sysctl option setup before.
2. Added test logic: If state file is trying to setup invalid sysctl option, that is not supported by the minion's kernel.
Update sysctl.py
Still load without all deps
Allow zmq-less deployment
Allow running salt-call without zmq
no zmq for local mode
No zmq for local mode
no crypto needed for local mode
Merge pull request #5731 from mlister2006/develop

Bugs fixed for the test conditions for states.sysctl
Move trans into place
fix spacing
looks like this should be false since no changes are pending
Add stdin support for cmd module

This commit adds the ability to specify stdin for the command that you
are running. This allows for more secure running of commands which
require sensitive info be piped into them.
Normalize the 'pwd' field in shadow.info output

This makes this field match the corresponding field in user.info.
Normalize the 'pwd' field in shadow.info output

This makes this field match the corresponding field in user.info. This
also updates the docstring for set_password to be more descriptive.
add freebsd shadow module
add netbsd shadow module
Make shadow support work in FreeBSD, NetBSD

This commit uses the new shadow modules for FreeBSD and NetBSD, as well
as updates the logic to only support shadow support where it is
supported.
Update docstring to reflect updated shadow support
Slight tweak to _shadow_supported()

When this function was added, Solaris support was improperly defined.
This commit fixes that.