Improve daemon "waiting" message, config reload behavior

Summary:
Ref T12298. Two minor daemon improvements:

• Make the "waiting" message reflect hibernation.
• Don't trigger a reload right after launching.

Test Plan:

• Read "waiting" message.
• Ran "bin/phd start", didn't see an immediate SIGHUP in the log.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T12298

Differential Revision: https://secure.phabricator.com/D17550