[Samba] Rename Computer In Samba Domain: Access Is Denied

[m]

It still doesn't work and I tried the same on a different Samba
installation which is version 3.3.2 and it behaved the same way. (Thus
covering versions 3.2.3 and 3.3.2).

I didn't mention before, this is with passdb backend = tdbsam.

I've been continuing to study the issue and I think the relevant error line is
<<
[2009/10/01 16:59:35,  2]
rpc_server/srv_samr_nt.c:access_check_samr_function(246)
  _samr_SetUserInfo: ACCESS DENIED (granted: 0x000d04e4;  required: 0x000000b0)
>>