upstream commit

don't count partial authentication success as a failure
 against MaxAuthTries; ok deraadt@
upstream commit

Add FingerprintHash option to control algorithm used for
 key fingerprints. Default changes from MD5 to SHA256 and format from hex to
 base64.

Feedback and ok naddy@ markus@
missing include for base64 encoding
upstream commit

document FingerprintHash here too
upstream commit

tweak previous;
upstream commit

poll changes to netcat (usr.bin/netcat.c r1.125) broke
 this test; fix it by ensuring more stdio fds are sent to devnull
upstream commit

adjust for new SHA256 key fingerprints and
 slightly-different MD5 hex fingerprint format