* lang/cpp/src/decryptionresult.cpp, lang/cpp/src/decryptionresult.h
(class DecryptionResult): Add method isBetaCompliance.
* lang/cpp/src/decryptionresult.cpp (operator<<): Add new flag.
* lang/cpp/src/key.cpp, lang/cpp/src/key.h (class Key): Add method
isBetaCompliance.
(class Subkey): Add method isBetaCompliance.
* lang/cpp/src/key.cpp:
(Key::isDeVs): Remove duplicate check of is_de_vs of first subkey.
(operator<<): Add new flag.
* lang/cpp/src/verificationresult.cpp, lang/cpp/src/verificationresult.h
(class Signature): Add method isBetaCompliance.
* lang/cpp/src/verificationresult.cpp (operator<<): Add new flag.