Add ssh config

home/ssh/default.nix

@@ -0,0 +1 @@
+{ imports = [ ./gunter.nix ]; }

home/ssh/gunter.nix

@@ -0,0 +1,12 @@
+{ pkgs, ... }: {
+  programs.ssh = {
+    enable = true;
+    matchBlocks."bmo.uio.no" = {
+      hostname = "bmo.uio.no";
+      extraOptions = {
+        ControlMaster = "auto";
+        ControlPath = "$XDG_RUNTIME_DIR/ssh/%r@%h:%p";
+      };
+    };
+  };
+}