Introduce requirement + examples for Domain renewal notifications + process

[antdking]

We've just renewed some of our domains, however the process is currently rather adhoc.

Introduce a requirement to have a process defined (either manual or automated) for domain renewal.

Also introduce a requirement to have notifications for when a domain is about to expire expire (time periods TBD).

[antdking]

Given most registrars have auto-renewal, I'm unsure on the importance of this