Log Message:
libssh: Update to 0.90

ChangeLog

    Added support for AES-GCM
    Added improved rekeying support
    Added performance improvements
    Disabled blowfish support by default
    Fixed several ssh config parsing issues
    Added support for DH Group Exchange KEX
    Added support for Encrypt-then-MAC mode
    Added support for parsing server side configuration file
    Added support for ECDSA/Ed25519 certificates
    Added FIPS 140-2 compatibility
    Improved known_hosts parsing
    Improved documentation
    Improved OpenSSL API usage for KEX, DH, KDF and signatures