update copyright

LICENSE

authorize/authorize.go

authorize/authorize_test.go

authorize/certRequest.go

backup/backup.go

backup/backup_test.go

backup/crypto.go

backup/crypto_test.go

backup/key.go

backup/key_test.go

backup/params.go

backup/params_test.go

broadcast/asymmetric.go

broadcast/asymmetric_test.go

broadcast/channel.go

broadcast/channel_test.go

broadcast/exportPrivateKey.go

broadcast/exportPrivateKeyVersions.go

broadcast/exportPrivateKey_test.go

broadcast/level.go