R1:057d62d570d4

Update Phlux for handleRequest

Summary: Ref T8628. Updates Phlux

Test Plan: New var, list vars, edit vars

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T8628

Differential Revision: https://secure.phabricator.com/D14267