Deprecate the prep_install option for seed.apply_
Merge pull request #14674 from basepi/seedlint

Deprecate the prep_install option for seed.apply_
fix link scheme, default scheme is HTTPS, as used sample configs

provided by the tut
Merge pull request #14678 from hvnsweeting/fix-doc-halite

fix link scheme, default scheme is HTTPS, as used sample configs