tv xsessions: add user urxvtd socket and service

tv/2configs/xsessions/default.nix

@@ -1,4 +1,5 @@
 {
   imports = [
+    ./urxvtd.nix
   ];
 }

tv/2configs/xsessions/urxvtd.nix

@@ -0,0 +1,15 @@
+{ pkgs, ... }: {
+  systemd.user.sockets.urxvtd = {
+    wantedBy = [ "sockets.target" ];
+    socketConfig.ListenStream = "%t/urxvtd";
+  };
+  systemd.user.services.urxvtd = {
+    restartIfChanged = false;
+    environment = {
+      RXVT_SOCKET = "%t/urxvtd";
+    };
+    serviceConfig = {
+      ExecStart = "${pkgs.rxvt_unicode}/bin/urxvtd";
+    };
+  };
+}