add missing dns request notify

src/dns.rs

@@ -58,6 +58,7 @@ impl DnsResolver {
 
             server.notify_client_update(handle);
 
+            log::info!("resolving ({handle}) `{hostname}` ...");
             let ips = match self.resolve(&hostname).await {
                 Ok(ips) => ips,
                 Err(e) => {

src/server.rs

@@ -287,6 +287,7 @@ impl Server {
 
     fn request_dns(&self, handle: ClientHandle) {
         self.pending_dns_requests.borrow_mut().push_back(handle);
+        self.notifies.dns_request_pending.notify_one();
     }
 
     async fn handle_request(