nixosMod: move sshSecurity to extends/openssh

nix/nixos-modules/default.nix

@@ -36,7 +36,6 @@ in
     ./options.nix
     ./privacy.nix
     ./secrix.nix
-    ./sshSecurity.nix
     ./useable.nix
     ./vmCommon.nix
   ];

nix/nixos-modules/extends/default.nix

@@ -3,6 +3,7 @@
     # files
     ./cpu.nix
     ./kernel.nix
+    ./openssh.nix
     ./podman.nix
     ./printing.nix
   ];

nix/nixos-modules/extends/openssh.nix

@@ -1,7 +1,6 @@
 {
   config,
   lib,
-  pkgs,
   ...
 }:
 let
@@ -9,9 +8,9 @@ let
 in
 {
 
-  options = {
+  options.services.openssh = {
 
-    services.openssh.authorizedKeysOnly = lib.mkEnableOption ''
+    authorizedKeysOnly = lib.mkEnableOption ''
       only logins using ssh keys (improving over default settings)
     '';