ActionParser::Specific - Makepp scanner class for a specified command scanner

	use ActionParser::Specific;
	my $scanner=ActionParser::Specific->new("CommandParser::Vcs");

ActionParser::Specific is a class of type ActionParser that always chooses the specified command parser.

	my $rp = ActionParser::Specific->new($command_parser_class_name);

Returns a new ActionParser object that always uses a default-constructed object of class $command_parser_class_name as its command parser.

	my $cp = $rp->find_command_parser($command, $rule, $dir, \$found);

Construct the predefined CommandParser class object with $rule and $dir.