Name the correct class in javadoc.

core/src/main/java/jenkins/AgentProtocol.java

@@ -4,7 +4,6 @@ import hudson.Extension;
 import hudson.ExtensionList;
 import hudson.ExtensionPoint;
 import hudson.TcpSlaveAgentListener;
-import hudson.model.AperiodicWork;
 import jenkins.model.Jenkins;
 
 import java.io.IOException;
@@ -40,7 +39,7 @@ public abstract class AgentProtocol implements ExtensionPoint {
     public abstract void handle(Socket socket) throws IOException, InterruptedException;
 
     /**
-     * Returns all the registered {@link AperiodicWork}s.
+     * Returns all the registered {@link AgentProtocol}s.
      */
     public static ExtensionList<AgentProtocol> all() {
         return ExtensionList.lookup(AgentProtocol.class);