+ mapping.insert(std::make_pair("Trusted", std::make_pair("trusted", false)));
+ mapping.insert(std::make_pair("Check-Valid-Until", std::make_pair("check-valid-until", false)));
+ mapping.insert(std::make_pair("Valid-Until-Min", std::make_pair("valid-until-min", false)));
+ mapping.insert(std::make_pair("Valid-Until-Max", std::make_pair("valid-until-max", false)));
+ mapping.insert(std::make_pair("Signed-By", std::make_pair("signed-by", false)));