Obsolete link in developer refrence important to new maintainers

[Goswin von Brederlow <brederlo@informatik.uni-tuebingen.de>]

Hi,

I just noticed that

http://www.debian.org/doc/developers-reference/ch-beyond-pkging.en.html#s-sponsoring

contains:

| If you wish to volunteer as a sponsor, you can sign up at
| http://www.internatif.org/bortzmeyer/debian/sponsor/.

and that service has been discontinued.

MfG
        Goswin