Allow bin/config to affect database configuration and migrate between local and database configuration
Summary: Fixes T4018. Basically hits the bullet points in that task description except the "ideally" one.
Test Plan:
ran bin/config migrate and saw sensible output.
~> ./bin/config migrate Migrating file-based config to more modern config... Skipping config of source type PhabricatorConfigDatabaseSource... Skipping config of source type PhabricatorConfigLocalSource... Skipping config of source type PhabricatorConfigDefaultSource... Done. Migrated 0 keys.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: hach-que, epriestley, Korvin
Maniphest Tasks: T4018
Differential Revision: https://secure.phabricator.com/D10490