Corrected user name passing
  Honor the --master-binary and --slave-binary options
  Insert the host name into 'user' table
  Added --udiff option, to get unified diff output
  Call special mtr_run_test() for running "mysqltest"
mtr_report.pl:
  Added --udiff option, to get unified diff output
init_db.sql:
  Insert the host name into 'user' table