Config - fix management scripts with --database parameter
Summary: Fixes T6923. Turns out we can't use the editor since we don't have a user with a phid (just some omnipotent guy).
Test Plan: ./bin/config set --database syntax.filemap '{}'; ./bin/config delete --database syntax.filemap
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T6923
Differential Revision: https://secure.phabricator.com/D11301