[PR] Force SSL admin and login on sites that support SSL

We'll have a grace period when sites are created where SSL may not yet be available for a specific domain. As dots are connected, this will provide the ability to mark specific domains as SSL ready, causing them to force SSL admin and login.

Over time we can convert this to handle front end as well with an additional option for "confirm SSL on front end" that can be processed after we know all HTTP links have been corrected.