o fixed logon script problems (wrong len in reply to net_sam_logon for

o fixed logon script problems (wrong len in reply to net_sam_logon for
  a few strings).  I was the one who broke it obviously.

o changed a few more defaults in the smbpasswd backend with
  respect to times.  Now the logon time becomes '0' and the
  pass_can_change_time is set ot the same as pass_last_set_time

o change Get_Pwnam() call in local_lookup_name to sys_getpwnam()
  as it did not seem necessary to try case permutations in the
  username.

  Tim,  I think this was your code, so you might want to double
  check me.

-- jerry
(This used to be commit 37a665002c5cd7908c13d306f61af272a899dbc8)