[support] Accounts w/no email address

[Luke]

I've googled a bit for this.  Other than some old patching-core 
discussions from 2008, I didn't come up with anything.

The ability to create accounts without email addresses in D6 is required. 
Is there a module with this capability?
It would have to permit accounts to get email addresses later (although we 
could do that via CCK if necessary).

This needs to be a regular module, not a core patch or hack of any kind, 
as I will not be maintaining this site going forward, and short of 
upgrades, I do not expect the future maintainer to be capable of migrating 
custom code.

Thanks

Luke