Create php-fpm pool for MediaWiki SaaS
Summary:
Allow to create a php-fpm pool, without taking care of the user account.
Environment contains public settings, but not private ones.
wikis.nasqueron.org is a virtual, not currently existing domain,
for php-fpm configuration purpose.
Ref T845.
Reviewers: dereckson
Reviewed By: dereckson
Maniphest Tasks: T845
Differential Revision: https://devcentral.nasqueron.org/D1446