Using r-c-samba, if I create a Samba user named bfox with bfox as the Windows
username as well, it does not add an entry to /etc/samba/smbusers.

If I edit the user to change the Windows username to something else, it
can't find it in smbusers and gives me the following:

Traceback (most recent call last):
  File "./addUserWin.py", line 86, in on_edit_user_ok_button_clicked
    self.samba_user_data.changeWindowsUserName(self.orig_unix_name, windows_name)
  File "./sambaUserData.py", line 141, in changeWindowsUserName
    if line == userDict[unix_name]:
KeyError: bfox