Summary: Ensures that weird behavior from filter_input_array does not remove keys from superglobals. Should fix T3677.
Test Plan:
Checked that $_SERVER contained same number of keys before and after
filtering, and that those affected by the original bug continue to be filtered
correctly.
Reviewers: epriestley, btrahan
Reviewed By: epriestley
CC: zorfling, aran, Korvin, wez
Maniphest Tasks: T3677
Differential Revision: https://secure.phabricator.com/D6680
b20a0eed13