that it tested the privilege in ::update() whereas it should be
in ::check() (see email from Serg, subject
"Re: bk commit - 4.1 tree (guilhem:1.1706)").
So I add instead a check_func function to sys_var_thd_bit.
I do the same addition to sys_var_thd_ulong, to unify handling
of PSEUDO_THREAD_ID with the one of SQL_LOG_BIN. So class
sys_var_pseudo_thread_id is not needed anymore, removing it.


mysql-test/r/rpl_temporary.result:
  result update
mysql-test/t/rpl_temporary.test:
  tests after new way of fixing; verify that when second variable
  assignment is refused then first is not done.
sql/set_var.cc:
  a check_func (check_log_update) when setting SQL_LOG_BIN,
  and one when setting PSEUDO_THREAD_ID.
  Removing class sys_var_pseudo_thread_id.
  Updates for new prototypes of constructor in sys_var_thd_bit
  and sys_var_thd_ulong.
sql/set_var.h:
  Adding check_func to sys_var_thd_bit.
  Adding check_func to sys_var_thd_ulong, so class sys_var_pseudo_thread_id
  is not needed anymore, removing it.