
Add:
 - yp*
 - nis*

user.c: Report error, if user is not found in /etc/shadow,
	but if data should be added.

chsh:
 - Add -D domainname parameter for NIS+
 - For NIS+, normal users can be admins
 - -r option
 
chage:
 - change data stored in NIS+
 - change data stored in LDAP
 - allow creating of new shadow entry for an account
   or report error that this entry does not exist.

