Add helpful information if user tries to run wallet command (#2759)

* Add warning message if user tries to run wallet command

* rustfmt

src/bin/grin.rs

@@ -73,6 +73,20 @@ fn real_main() -> i32 {
 	let args = App::from_yaml(yml).get_matches();
 	let node_config;
 
+	// Temporary wallet warning message
+	match args.subcommand() {
+		("wallet", _) => {
+			println!();
+			println!("As of v1.1.0, the wallet has been split into a seperate executable.");
+			println!(
+				"Please visit https://github.com/mimblewinble/grin-wallet/releases to download"
+			);
+			println!();
+			return 0;
+		}
+		_ => {}
+	}
+
 	let chain_type = if args.is_present("floonet") {
 		global::ChainTypes::Floonet
 	} else if args.is_present("usernet") {

src/bin/grin.yml

@@ -13,6 +13,9 @@ args:
       long: usernet
       takes_value: false
 subcommands:
+  - wallet:
+      about: As of v1.1.0, the wallet has been split into a separate executable. See https://github.com/mimblewimble/grin-wallet/releases
+      usage: As of v1.1.0, the wallet has been split into a separate executable. See https://github.com/mimblewimble/grin-wallet/releases to download
   - server:
       about: Control the Grin server
       args: