Adding support for ECDSA SSH key type

ID: FR11P03735 Priority: Low
Products: NoMachine Server Target: 6
Status: Approved  

At the moment, NoMachine key-based authentication methods support only DSA and RSA key types in OpenSSH format.

The NoMachine key-based authentication methods should be extended to support also ECDSA keys (Elliptic Curve Digital Signature Algorithm) . This applies to both connections by NX and SSH protocol.

Support for Ed25519 keys will be also added: https://www.nomachine.com/FR05Q03832.