R1:2efd8fe97125

Fix a bad %d for PHID

Summary: D1174 caught this issue -- we mean to load all //your// rules, but
actually load //all// rules. Use %s correctly.

Test Plan: Hit /herald/rule/ without an exception.

Reviewers: fmoo, btrahan, jungejason

Reviewed By: btrahan

CC: aran, epriestley, btrahan

Differential Revision: 1203