parser.mly: added more "on_error_reduce" cases
parser.mly: added more "on_error_reduce" cases

See comments in parser.mly, at the beginning

FredMaris/touist,olzd/touist,olzd/touist,touist/touist,touist/touist,touist/touist,FredMaris/touist,touist/touist,olzd/touist,FredMaris/touist