fixed bugs in delayed insert replication and when slave loses connection after Int_var but before Query
public test suite now tests replication code as well


mysql-test/mybin/mysql-test_install_db:
  fixes to test replication with two daemons on one machine
mysql-test/mysql-test-run:
  fixes for replication tests -- still need to test gcov, the rest works
mysql-test/t/include/master-slave.inc:
  include file for replication tests
sql/slave.cc:
  fixed bug for the case when the slave loses connection after it has read Int_var event but before Query
sql/sql_insert.cc:
  reset error in delayed thread
  slave converts delayed insert to regular