mxqi: Allow DSA keys

We still have users with old DSA keys. Allow it for now.

mxqi/mxqi

@@ -183,6 +183,7 @@ sub server {
         print $out "X11Forwarding yes\n";
         print $out "AddressFamily inet\n";
         print $out "HostKey $tmpdir/ssh_host_ed25519_key\n";
+        print $out "PubkeyAcceptedKeyTypes=+ssh-dss\n";      # still some old users with DSA keys
     }
 
     my $data_socket = $listen_socket->accept();