Don't reconnect client on close


libmysql/libmysql.c:
  Don't reconnect on close
mysql-test/r/heap.result:
  Fixed heap table test
sql/field.cc:
  Backed out wrong HEAP table bug fix
sql/ha_heap.h:
  cleanup
sql/mini_client.cc:
  Don't reconnect on close
sql/opt_range.cc:
  Don't use ranges on HEAP tables with LIKE