Mail::Encodings.value_decode cannot decode MS950 charset.

[tonytonyjan]

string = '=?MS950?B?rue26aWrrEapssS1ue6nvaXms3G5SLNX?= =?MS950?B?wMvBfLFNsM/Ay8F8pEirSL1jpmGnfcXn?= =?MS950?B?w9KhXaa5q0il86ywqHSyzqbbsMq1b7Bl?= =?MS950?B?oUG90MJJv++kVaTos3O1sqFBpMWmXrRfKQ==?='
Mail::Encodings.value_decode string
# => "�������F�����������q�H�W���|�M�����|�H�H�c�a�}�����]���H�����t�������o�e�A���I���U���s���A���^�_)"

Mail::Encodings.value_decode string.gsub('MS950', 'CP950')
# => "桃園市政府警察局交通違規檢舉專區檢舉人信箱地址驗證（此信件為系統自動發送，請點選下方連結，勿回復)"

Maybe we can alias MS950 to CP950？