[X2Go-Dev] Bug#1086: update package x2go-keyring with new package signing key

Package: x2go-keyring

Hi!

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://packages.x2go.org/debian stretch InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F4A7678C9C6B0B2B

Please update the x2go-keyring package with the new package signing key and store the public key in /etc/apt/trusted.gpg.d so apt can use it to check the repository.

Please also update the wiki page http://wiki.x2go.org/doku.php/wiki:repositories:debian and list the new key ID.

Thanks!

Christian