'.' in username

[Thanos Tsouanas <thanos_(_at_)_sians_(_dot_)_org>]

Hello.

I just found out that chsh complains if a username has a '.' in it:

% sudo chsh foo.bar
[ ... ]
chsh: '.' is dangerous in a login name

I'm sure there's a reason (why? regexps involved?) but I think that
since chsh complains, adduser should complain too.  No?

-- 
Thanos Tsouanas          .: My Music: http://www.thanostsouanas.com/
http://thanos.sians.org/ .: Sians Music: http://www.sians.org/