Use default user shell

Author: kylecarbs

packages/protocol/src/node/server.ts

@@ -85,9 +85,7 @@ export class Server {
 				throw new Error(`unrecognized platform "${platform}"`);
 		}
 		initMsg.setOperatingSystem(operatingSystem);
-		if (global.process.env.SHELL) {
-			initMsg.setShell(global.process.env.SHELL);
-		}
+		initMsg.setShell(os.userInfo().shell || global.process.env.SHELL);
 		const srvMsg = new ServerMessage();
 		srvMsg.setInit(initMsg);
 		connection.send(srvMsg.serializeBinary());