and BUG#1966: "select 1 into a" on top-level hangs client


include/mysql_com.h:
  Added no_send_eof flag to NET for SP cursors (the simple read-only version).
mysql-test/r/sp-error.result:
  Added tests for BUG#1965 and BUG#1966.
mysql-test/t/sp-error.test:
  Added tests for BUG#1965 and BUG#1966.
sql/net_serv.cc:
  Added no_send_eof flag to NET for SP cursors (the simple read-only version).
sql/protocol.cc:
  Added no_send_eof flag to NET for SP cursors (the simple read-only version).
sql/sp_rcontext.cc:
  Use net->no_send_eof flag to prevent eofs during cursor open (instead of
  the dirty vio=0 which didn't work).
sql/sp_rcontext.h:
  Use net->no_send_eof flag to prevent eofs during cursor open (instead of
  the dirty vio=0 which didn't work).
sql/sql_yacc.yy:
  Give error message if doing SELECT ... INTO localvar even if it's outside an SP.