new test for this.


sql/item_create.cc:
  Proper replication of CONNECTION_ID() (bug 177).
  This is just for replication; mysqlbinlog|mysql still does not work
  with CONNECTION_ID(), it will wait for row-level binlogging.
sql/item_strfunc.cc:
  Proper replication of the new 4.1 PASSWORD() (bug 344)