Allow other SaltStack projects to reuse `warn_until`.
Allow network related tests to be skipped if no network is available. Fixes #6710.
Merge pull request #6737 from s0undt3ch/hotfix/6710-skip-network-tests

Allow network related tests to be skipped if no network is available
Merge pull request #6736 from s0undt3ch/features/reusable-warn-until

Allow other SaltStack projects to reuse `warn_until`.
Clarify the minion ID generation docs
Merge pull request #6738 from terminalmage/walkthrough-fix

Clarify the minion ID generation docs
Adapt the test case to the changes introduced in 7e9e889