Internal sites use same domain

[sseidel16]

Internal moodle and mail sites use same domain staff.3hacademy.org, but they should use different domains to prevent cookie conflicts and unwanted "cross-domain" issues.

Use:

• staff.3hacademy.org
• mail.3hacademy.org (forward all ports used by firewall; I think there are 3)
• learning.3hacademy.org
• (in future) office.3hacademy.com

[sseidel16]

Completed using different domains. Still need to check what ports are being used currently by the firewall.