Description of problem:

When samba is configures to be a PDC and you try to add a new machine
to the domain samba adds a machine account to the samba user database
and the unix passwd file.  In order to differentiate this machine
account from a regular user account samba uses a '$' as a suffix to
the name.  Previously to FC3 adding a user account in the form of
'machine1$' worked fine with a command of something similiar to:
useradd machine1\$  (with whatever preferences for group and home
directory - I used -d /dev/null -g machines).

In FC3 this no longer works.  This is the attempt and error message:

	root@server(~): useradd machine1\$
	useradd: invalid user name 'machine1$'

So as it stands FC3 is not usable to run samba as a domain controller.

Version-Release number of selected component (if applicable):

samba-3.0.8-0.pre1.3 on FC3 i386

How reproducible:

Always

Steps to Reproduce:
1. run useradd machine1\$
2.
3.
  
Actual results:

useradd: invalid user name 'machine1$'

Expected results:

User machine1$ added to system

Additional info: