Added reset method for extension called by the draft

When the draft should reset, also the used extension should be reset

Author: marci4

src/main/java/org/java_websocket/drafts/Draft_6455.java

@@ -322,6 +322,15 @@ public List<Framedata> translateFrame( ByteBuffer buffer ) throws InvalidDataExc
  }
  }
 
+@Override
+publicvoidreset(){
+super.reset();
+if (extension != null){
+extension.reset();
+ }
+extension = null;
+ }
+
 /**
  * Generate a date for for the date-header
  *

src/main/java/org/java_websocket/extensions/DefaultExtension.java

@@ -79,6 +79,10 @@ public IExtension copyInstance(){
 returnnewDefaultExtension();
  }
 
+publicvoidreset(){
+//Nothing to do here. No internal stats.
+ }
+
 @Override
 publicStringtoString(){
 returngetClass().getSimpleName();

src/main/java/org/java_websocket/extensions/IExtension.java

@@ -99,6 +99,11 @@ public interface IExtension{
  */
 IExtensioncopyInstance();
 
+/**
+ * Cleaning up internal stats when the draft gets reset.
+ */
+voidreset();
+
 /**
  * Return a string which should contain the class name as well as additional information about the current configurations for this extension (DEBUG purposes)
  *