change: pdb_getsampwrid() ->pdb_getsampwsid()

change: pdb_getsampwrid() ->pdb_getsampwsid()

passdb interface change, now the passdb modules will be asked for SID not for rid, the modules have been updated with a passthrough function that calls the old getsampwrid() functions.

srv_samr_nt.c functions that made use of the pdb_getsampwrid funcion has been updated to use the SID one.
(This used to be commit f5c6496c33fa7f5c2826540ffb4a49d8a5790fb3)