[X2Go-Dev] Windows client fails to launch with DSA key

[Jan Engelhardt]

The 4.5.0.2 x2goclient for Windows always passes the -h argument to 
sshd:

    strm<<clientdir<<"\\sshd.exe -D -p "<<clientSshPort.toInt()<<" -f 
"<< config <<" -h "<<key;

with key being:

    std::string 
key="\""+cygwinPath(etcDir+"/ssh_host_dsa_key").toStdString()+"\"";

However, the shipped sshd does not autogenerate a DSA key by default 
anymore, only RSA. If x2goclient wants to use a specific key, it should 
make sure that it exists beforehand or generate it itself.