Make it clear that the project website must be hosted on EF managed servers

Submitted by Wayne Beaton @wbeaton

Link to original bug (#535141)

Description

The section that discusses the project website implies, but does not state that the project website must be hosted on EF managed servers.

That is, the website that the user ends up on by navigating to http://www.eclipse.org/`<short-name>` must be running on EF infrastructure. This could be (as is default) the "PMI" page that's generated from project metadata, or a custom site that hosted on our www servers.

This URL must not, for example, redirect to a community portal.