Added two-stroke mechanism for detaching

client.c

@@ -63,6 +63,7 @@ static int client_mainloop(void) {
 	sigprocmask(SIG_BLOCK, &blockset, NULL);
 
 	client.need_resize = true;
+    client.await_command = false;
 	Packet pkt = {
 		.type = MSG_ATTACH,
 		.u.i = client.flags,
@@ -121,15 +122,21 @@ static int client_mainloop(void) {
 				die("client-stdin");
 			if (len > 0) {
 				debug("client-stdin: %c\n", pkt.u.msg[0]);
+                if (client.await_command) {
+                    client.await_command = false;
+                    if (pkt.u.msg[0]=='d') { 
+                        pkt.type = MSG_DETACH;
+                        pkt.len = 0;
+                        client_send_packet(&pkt);
+                        close(server.socket);
+                        return -1;
+                    }
+                }
 				pkt.len = len;
 				if (KEY_REDRAW && pkt.u.msg[0] == KEY_REDRAW) {
 					client.need_resize = true;
 				} else if (pkt.u.msg[0] == KEY_DETACH) {
-					pkt.type = MSG_DETACH;
+                    client.await_command = true;
-					pkt.len = 0;
-					client_send_packet(&pkt);
-					close(server.socket);
-					return -1;
 				} else if (!(client.flags & CLIENT_READONLY)) {
 					client_send_packet(&pkt);
 				}

splex.c

@@ -100,6 +100,7 @@ struct Client {
 		CLIENT_LOWPRIORITY = 1 << 1,
 	} flags;
 	Client *next;
+    bool await_command;
 };
 
 typedef struct {