R1:62dfcd1e552f

Fix the visibility of `PhutilDaemon::run` methods

Summary: Ref T6822. This method is only called from `PhutilDaemon::execute()` and can be made `protected`.

Test Plan: See D11404.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T6822

Differential Revision: https://secure.phabricator.com/D11405