Summary:
Ref T11672. At low loads, this causes us to use more connections, which is pushing some installs over the default limits.
Rather than trying to walk users through changing `max_connections`, `open_files_limit`, `fs.file-max`, `ulimit`, etc., just put things back for now. After T11044 we should have headroom to use persistent connections within the default limits on all reasonable systems..
Test Plan: Loaded Phabricator, poked around.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11672
Differential Revision: https://secure.phabricator.com/D16591