was used. (Bug #10724)


mysql-test/r/key_cache.result:
  Updated results
mysql-test/r/ps_1general.result:
  Updated results
mysql-test/r/user_var.result:
  Add new results
mysql-test/r/variables.result:
  Update results
mysql-test/t/user_var.test:
  Add new regression test
sql/item_func.cc:
  Don't set name explicitly in get_system_var(), let it get set by the
  select_item: rule in sql_parse.yy or other callers of get_system_var().
sql/sql_parse.cc:
  Set the name on the Item returned by get_system_var().