increase socket timeout

The old value of 2ms lead to 45% load for a single core

pdb-ui/src/main/java/org/lucares/pdbui/TcpIngestor.java

@@ -90,7 +90,7 @@ public class TcpIngestor implements Ingestor, AutoCloseable, DisposableBean {
             port = serverSocket.getLocalPort();
             LOGGER.info("listening on port " + serverSocket.getLocalPort());
 
-            serverSocket.setSoTimeout((int) TimeUnit.MILLISECONDS.toMillis(2));
+            serverSocket.setSoTimeout((int) TimeUnit.MILLISECONDS.toMillis(100));
             started.countDown(); // notify caller that the socket is now listening
 
             while (acceptNewConnections.get()) {