Listen to conference.nasqueron.org for Openfire

Summary:
Under the current HTTP certificate validation scheme,
the subdomain for Openfire subservices must be able
to serve acme challenges.

It's probably also a good idea to listen to those
services domains to offer the UI.

Ref T1513.

Test Plan: Extend TLS LE certificate to conference.nasqueron.org

Reviewers: dereckson

Reviewed By: dereckson

Maniphest Tasks: T1513

Differential Revision: https://devcentral.nasqueron.org/D2065