R1:20a54a3006de

Apply "pcre.*_limit" ini options in web environments

Summary: Ref T13100. Ref T13586. See D21566, which applied these changes to CLI environments. Also apply them to web environments.

Test Plan: Loaded Phabricator.

Maniphest Tasks: T13586, T13100

Differential Revision: https://secure.phabricator.com/D21567