I'd say that you don't need to worry too much about the footer link.
Fact of the matter is that, in the spirit of open-source, we never ever placed too much emphasis on the footer link requirement.
If you take a look at the forum you won't find a *single* post where we replied by saying that "Your site is neither licensed nor carries the footer link so we cannot give you support". And, trust me, I come across such sites regularly.
So the point is - the license clauses have not been changed but we have no intention of 'suing' people to get it enforced. Couch is an open-source project and, as I mentioned, in the spirit of it we leave it totally on the users' conscience to comply with the requirement.
Those who want to do it can put in a back-link manually.
I think you also need to change the config.php comments if you are going to make these sorts of changes without any publicity
The config file that ships with v1.4.7 (config.example.php), in fact, no longer has the setting to turn the footer link on/off. Upgrades do not write over the existing config file so there is little we could do about the previous versions.
otherwise most of us will be on the wrong side of the copyright laws.
I do appreciate your concern, @TOF. Hope my reply allays your apprehensions.
I'm also moving over this thread to the announcements section so as to bring this change to light more prominently.