[Samba] Identically named users and groups

[Josh Kelley]

We have a Linux user and group with the same name (username prox,
group name prox) and a Samba share with "force user = prox" set.
Since upgrading from Samba 3.0.21b to Samba 3.0.23a, that share no
longer works.  smbclient gives the following error when connecting to
the share:

tree connect failed: NT_STATUS_NO_SUCH_USER

The Samba server logs the following error:

[2006/08/07 09:38:26, 1] auth/auth_util.c:create_token_from_username(1060)
  prox is a Domain Group, not a user

So Samba no longer likes having a user and group by the same name.  Is
this an intentional change in Samba 3.0.23, or is it a bug?  I don't
remember seeing anything about it in the release notes.

Josh Kelley