[TYPO3-project-seminars] additional url-field to registration

[Robert Grede]

Hi,

I have 2 variants for registration:

1. The registration-process of own events must be done on the 
registration page of the seminars extension.

1. Some events must be registered on the organizers site directly.

I think, an additional field for an external url should be realized. Or 
is there another way instead?

Robert