#183 Pre-Assign emailadresses to auto-add users when registring

[Jakob Peterhänsel]

For some community sites, it would really ease administration if it
was possible to pre-register a list of email-addresses that should be
auto-added to a Group ones that email is used for an account
registration.

Say you have a sportsteam, where the coach get all members
emails at season start.
Coach then ask admin to add these as 'allowed' into the team-group.
When team-member register, Xoops auto-add member to the Group
(that then add access to forums etc fot the team)

This feature would really make me ship a large beer around the
world!