pam_login THANKS file

The original Author of this login program is not known to me. But
many people further contributed to pam_login by reporting problems,
suggesting various improvements or submitting actual code.  Here is
a list of these people.  Help me keep it complete and exempt of errors.

Chris PeBenito <pebenito@gentoo.org>
Klaas Hagemann <Klaas.Hagemann@mummert.de>

