This version provides performance improvement for sftp and offers an
option to set TCP_NODELAY. In addition it a new known_hosts API which is
less error prone.
The following bugs have been address by libssh upstream:
BUG 350596
BUG 284867
BUG 296526
BUG 314451
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>