limit.


mysql-test/r/ps.result:
  Post-merge fixes.
mysql-test/t/ps.test:
  Post-merge fixes.
sql/share/errmsg.txt:
  Add a new error message for max_prepared_stmt_count limit,
  we can do it in 5.0
sql/sql_class.cc:
  Post-merge fixes.
sql/sql_class.h:
  Post-merge fixes.
sql/sql_prepare.cc:
  Post-merge fixes.