"using salt at scale" tutorial for the docs
url test
url test2
link test2
added links to two auth-loop issues
put infos into a note box
highlight topics
remove all you's and rewrite some sentences
remove all you's and rewrite some sentences
Merge branch 'salt_at_scale_doc' of https://github.com/felskrone/salt into salt_at_scale_doc

Conflicts:
	doc/topics/tutorials/intro_scale.rst
fix link
rewrite a few sentences, re-ordering, etc.
Check and fix wrong x509 version field.

This fixes #11653.
Change mod_random to use pycrypto backend.
Fixes some documentation.
add finger_master to key module

This would help us because we need to validate the master key is up to
date.

The plan is to expose the finger prints on the master (via salt-api).
The minion will periodically check. If it's master finger print is
wrong, then the minion will delete and start the auth process again.
Adding the ability to schedule Salt jobs using cron like syntax for the time.  Updated module and state to be able to use this new functionality.  Some general cleanup in utils/schedule.py, modules/schedule.py and states/schedule.py
Fixes linting error.
Removes whitespace.
Fix the option for sqlite_queue_dir