Implement network-specific metadata handling in commands. (#518)

Co-authored-by: Pascal Birchler <pascal.birchler@gmail.com>
Co-authored-by: Jonny Harris <jonathan.harris@news.co.uk>
Co-authored-by: Pascal Birchler <pascalb@google.com>

Update file(s) from wp-cli/.github

Fix expected output for site-empty in tests based on resolved HTTPS f…

…allback

Regenerate README file (#604)

Co-authored-by: Alain Schlesser <alain.schlesser@gmail.com>

Merge pull request #543 from wp-cli/fix/behat-error

Fix broken term recount test

Merge pull request #530 from BhargavBhandari90/issue-98-remove-cap-im…

…provement

Merge pull request #531 from wp-cli/refine-feature-files

Merge pull request #511 from wp-cli/no-lock-file

Merge pull request #501 from ernilambar/update/readme

Merge pull request #498 from i-am-chitti/GH-231/site-generate