Adapt visibility of setRecipientSeq to public.

Add setRecipientReplayWindow.
Fixes issue #2222.

Signed-off-by: Achim Kraus <achim.kraus@cloudcoap.net>

cf-oscore/src/main/java/org/eclipse/californium/oscore/OSCoreCtx.java

@@ -645,11 +645,20 @@ public synchronized void setSenderSeq(int seq) {
 
 	/**
 	 * @param seq the recipient sequence number to set
+	 * @since 3.11 (adjust visibility to public)
 	 */
-	synchronized void setRecipientSeq(int seq) {
+	public synchronized void setRecipientSeq(int seq) {
 		lowest_recipient_seq = seq;
 	}
 
+	/**
+	 * @param window the recipient replay window to set
+	 * @since 3.11
+	 */
+	public synchronized void setRecipientReplayWindow(int window) {
+		recipient_replay_window = window;
+	}
+
 	/**
 	 * Enables setting the sender key
 	 *