Rename intern/extern tests to internal/external

docs/howto-develop.rst

@@ -13,8 +13,8 @@ You can run the testsuite via
 
 ::
 
-   $ nix-build tests -A extern.nixpkgs_20_03
-   $ nix-build tests -A intern.nixpkgs_unstable
+   $ nix-build tests -A external.nixpkgs_20_03
+   $ nix-build tests -A internal.nixpkgs_unstable
    ...
 
 Contributing to the documentation

tests/default.nix

@@ -1,9 +1,9 @@
 # Generate an attribute sets containing all tests for all releaeses
 # It looks like:
-# - extern.nixpkgs_20.03
-# - extern.nixpkgs_unstable
-# - intern.nixpkgs_20.03
-# - intern.nixpkgs_unstable
+# - external.nixpkgs_20.03
+# - external.nixpkgs_unstable
+# - internal.nixpkgs_20.03
+# - internal.nixpkgs_unstable
 
 with builtins;
 
@@ -32,8 +32,8 @@ let
   ];
 
   testNames = [
-    "intern"
-    "extern"
+    "internal"
+    "external"
     "clamav"
     "multiple"
   ];

tests/external.nix

@@ -17,7 +17,7 @@
 { pkgs ? import <nixpkgs> {}}:
 
 pkgs.nixosTest {
-  name = "extern";
+  name = "external";
   nodes = {
     server = { config, pkgs, ... }:
         {

tests/internal.nix

@@ -37,7 +37,7 @@ let
   passwordFile = pkgs.writeText "password" "my-password";
 in
 pkgs.nixosTest {
-  name = "intern";
+  name = "internal";
   nodes = {
     machine = { config, pkgs, ... }: {
       imports = [