[Samba] Password-less share, for certain users.

[Miguel Medalha]

> "guest account" defines the unix account that is used to access the 
> file system when a guest connection is used. It doesn't determine who 
> can use the guest account.

Huuummm....

 From the smb.conf man page:

guest account (G)
This is a username which will be used for access to services which are 
specified as guest ok (see below). Whatever privileges this user has 
will be available to any client connecting to the guest service. This 
user must exist in the password file, but does not require a valid 
login. The user account "ftp" is often a good choice for this parameter.

On some systems the default guest account "nobody" may not be able to 
print. Use another account in this case. You should test this by trying 
to log in as your guest user (perhaps by using the su - command) and 
trying to print using the system print command such as lpr(1) or lp(1).

This parameter does not accept % macros, because many parts of the 
system require this value to be constant for correct operation.

Default: guest account = nobody # default can be changed at compile-time

Example: guest account = ftp