rem: int proto;
add: unsigned int proto;
context: find_proto(const char *pname, enum ip6t_tryload tryload, int nolookup){	int proto;	proto = string_to_number(pname, 0, 255);	if (proto != -1) 		return find_match(proto_to_name(proto, nolookup), tryload);	return find_match(pname, tryload);}