The JNLP port is not interesting enough to warrant logging at INFO during...

The JNLP port is not interesting enough to warrant logging at INFO during every startup, including the vast majority of functional tests which do not even use JNLP slaves.

core/src/main/java/hudson/TcpSlaveAgentListener.java

@@ -33,7 +33,6 @@ import java.io.OutputStreamWriter;
 import java.io.PrintWriter;
 import java.net.BindException;
 import java.net.InetSocketAddress;
-import java.net.ServerSocket;
 import java.net.Socket;
 import java.nio.channels.ServerSocketChannel;
 import java.util.logging.Level;
@@ -76,7 +75,7 @@ public final class TcpSlaveAgentListener extends Thread {
         }
         this.configuredPort = port;
 
-        LOGGER.info("JNLP slave agent listener started on TCP port "+getPort());
+        LOGGER.log(Level.FINE, "JNLP slave agent listener started on TCP port {0}", getPort());
 
         start();
     }