[Samba] 3.6.0 winbind issues

[Chris Smith]

Testing 3.6.0 on a member server of a 3.5.8 domain shows some strange problems.

With the standard:
  idmap config * : backend = tdb

    no results are returned by getent, and wbinfo does not always
work, also no winbind_idmap.tdb file is ever created.

by changing to:
  idmap config * : backend = rid
or
  idmap config * : backend = hash

    results are obtained but are the same regardless of range (or base_rid).