rush: add maintainer and fix warning (#393406)

maintainers/maintainer-list.nix

@@ -3748,6 +3748,12 @@
     githubId = 382011;
     name = "c4605";
   };
+  c4f3z1n = {
+    name = "João Nogueira";
+    email = "shires.waking0d@icloud.com";
+    github = "c4f3z1n";
+    githubId = 22820003;
+  };
   c4thebomb = {
     name = "Ceferino Patino";
     email = "c4patino@gmail.com";

pkgs/by-name/ru/rush/package.nix

@@ -32,6 +32,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
 
   meta = {
+    mainProgram = "rush";
     broken = stdenv.hostPlatform.isDarwin;
     description = "Restricted User Shell";
 
@@ -51,9 +52,11 @@ stdenv.mkDerivation rec {
 
     homepage = "https://www.gnu.org/software/rush/";
     license = lib.licenses.gpl3Plus;
-
-    maintainers = [ ];
     platforms = lib.platforms.all;
+
+    maintainers = with lib.maintainers; [
+      c4f3z1n
+    ];
   };
 
   passthru = {