R1:6f50729a9171

Update Phabricator for new daemon pool changes

Summary:
Ref T12298. This updates `bin/phd` for minor changes to daemon configuration. In particular:

- Every daemon now has an autoscale pool (for trigger/pull, the maximum pool size is 1).
- Pools now have labels to make debugging a little easier.
- Some minor structural changes.

Test Plan: See D17389.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T12298

Differential Revision: https://secure.phabricator.com/D17390