Fix an issue where PHP puts the content type in CONTENT_TYPE instead of HTTP_CONTENT_TYPE
Summary: Fixes T4084. See that task for discussion.
Test Plan: Did git clone. My setup doesn't precisely reproduce the original issue, but hopefully @enko can confirm this is a fix.
Reviewers: btrahan, enko
Reviewed By: enko
CC: enko, aran
Maniphest Tasks: T4084
Differential Revision: https://secure.phabricator.com/D7561