lib/config: Minor attribute updates

As discussed in
https://github.com/syncthing/docs/pull/169

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3082

lib/config/config_test.go

@@ -59,7 +59,7 @@ func TestDefaultValues(t *testing.T) {
 		URPostInsecurely:        false,
 		ReleasesURL:             "https://api.github.com/repos/syncthing/syncthing/releases?per_page=30",
 		AlwaysLocalNets:         []string{},
-		OverwriteNames:          false,
+		OverwriteRemoteDevNames: false,
 		TempIndexMinBlocks:      10,
 	}
 
@@ -188,7 +188,7 @@ func TestOverriddenValues(t *testing.T) {
 		URPostInsecurely:        true,
 		ReleasesURL:             "https://localhost/releases",
 		AlwaysLocalNets:         []string{},
-		OverwriteNames:          true,
+		OverwriteRemoteDevNames: true,
 		TempIndexMinBlocks:      100,
 	}