Added an example to the FAQ for how to restart Salt with Salt

Closes #12243
BUG: Outputter "nested" swallows lines ending with \r\n
Correct salt-ssh cache_job() data structure to match master+minion.

Prior to this the return data structure had a gratuitous "host" level.

Fixes existing bug.
Fix salt.client.ssh.key_deploy()

Fixes existing bug.
Fix env= in masterless mode
Merge pull request #12429 from whiteinge/doc-restart-faq

Added an example to the FAQ for how to restart Salt with Salt
Merge pull request #12438 from plastikos/outputter_nested_swallows_CR_NL

BUG: Outputter "nested" swallows lines ending with \r\n
Merge pull request #12439 from plastikos/bug-salt-ssh_job_cache_data_structure

Correct salt-ssh cache_job() data structure to match master+minion.
Merge pull request #12440 from plastikos/bug-fix_ssh_key_deploy

Fix salt.client.ssh.key_deploy()
Merge pull request #12442 from cachedout/7512

Fix env= in masterless mode
Adding ability to manage to the system wide ssh_known_hosts file.  Per request #6878
Restoring the ordering of the arguments in the ck, rm and set known_host functions.  Setting the default value for hostname as None but checking to ensure that is not None.