server: fix server exit once a accept failed

If the Accept error occurs, an error can be output to ensure that the
subsequent connect can be accepted normally.

Fixes: #239
Signed-off-by: Quanwei Zhou <[email protected]>

src/sync/server.rs

@@ -369,7 +369,7 @@ impl Server {
                         }
                         Err(e) => {
                             error!("listener accept got {:?}", e);
-                            break;
+                            continue;
                         }
                     };