Summary: Ref T5141. Currently, `php_compat_info.json` is hardcoded to support PHP 5.2.3. Instead, store as much version information as possible in `php_compat_info.json` and filter accordingly in `ArcanistXHPASTLinter.`
Test Plan: Ran `arc lint` and made sure no additional warnings were raised.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: epriestley, Korvin
Maniphest Tasks: T5141
Differential Revision: https://secure.phabricator.com/D9247
Summary: Also warn against functions not available on Windows at all.
Test Plan: Compared old and new file.
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, Korvin
Differential Revision: https://secure.phabricator.com/D5975