Replace xeon07 by hut in ssh config

The xeon07 machine has been renamed to hut.

Reviewed-by: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>

m/module/ssh-hut-extern.nix

@@ -1,9 +1,8 @@
 {
   programs.ssh.extraConfig = ''
-    Host ssfhead
+    Host apex ssfhead
       HostName ssflogin.bsc.es
     Host hut
-      ProxyJump ssfhead
+      ProxyJump apex
-      HostName xeon07
   '';
 }

m/raccoon/configuration.nix

@@ -51,13 +51,11 @@
 
   # Configure Nvidia driver to use with CUDA
   hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.production;
+  hardware.nvidia.open = false; # Maxwell is older than Turing architecture
   hardware.graphics.enable = true;
   nixpkgs.config.nvidia.acceptLicense = true;
   services.xserver.videoDrivers = [ "nvidia" ];
 
-  # Disable garbage collection for now
-  nix.gc.automatic = lib.mkForce false;
-
   services.openssh.settings.X11Forwarding = true;
 
   services.prometheus.exporters.node = {