[X2Go-Dev] The cygwin sshd problem [advice wanted]

For those who don't know about the issue with X2Go Client for Windows that is holding up its 4.0.5.1 release, upgrading cygwin sshd from 6.8p1-1 to 7.1p2-1 broke our folder sharing & printer sharing feature.

After I added the cygwin sshd logging feature, I see this in the sshd log file: Unable to negotiate with 127.0.0.1: no matching host key type found. ... http://pastebin.com/M7CeySQ9

After doing some research, it looks like this is the incompatible change: http://www.openssh.com/txt/release-7.0

• Support for ssh-dss, ssh-dss-cert-* host and user keys is disabled by default at run-time. These may be re-enabled using the instructions at http://www.openssh.com/legacy.html

What I am wondering is this: Are we limiting ourselves to ssh-dss-cert-* keys, or is sshfs limiting us?

-Mike