Updates ToC

13-watchtowers.md

@@ -27,16 +27,23 @@ For the rest of this document we will use server/tower and client/Lightning node
 * [Watchtower discovery](#watchtower-discovery)
 * [Watchtower services](#watchtower-discovery)
 	* [Basic Service](#basic-service)
-	* [Extensions](#extension)
-* [Sending and receiving appointments](#sending-and-receiving-appointments)
- 	* [The `add_update_appointment` message](#the-add-update-appointment-message)
+	* [Extensions](#extensions)
+* [User authentication](#user-authentication)
+	* [The `register_top_up` message](#the-register_top_up-message)
+	* [The `subscription_deltais` message](#the-subscription_details-message)
+* [Sending appointments to the tower](#sending-and-receiving-appointments)
+ 	* [The `add_update_appointment` message](#the-add_update_appointment-message)
  	* [The `appointment_accepted` message](#the-appointment_accepted-message)
  	* [The `appointment_rejected` message](#the-appointment_rejected-message)
-* [Quality of Service data](#quality-of-service-data)
-	* [`accountability`](#accountability)
+* [Deleting appointments](#deleting-appointments)
+	* [The `delete_appointment` message](#the-delete_appointment-message)
+	* [The `deletion_accepted` message](#the-deletion_accepted-message)
+	* [The `deletion_rejected` message](#the-deletion_rejected-message)
 * [Transaction Locator and Encryption Key](#transaction-locator-and-encryption-key)
 * [Encryption Algorithms and Parameters](#encryption-algorithms-and-parameters)
 * [Payment Modes](#payment-modes)
+* [Data serialisation and signing](#data-serialisation-and-signing)
+* [Attacks on towers](#attacks-on-towers)
 * [No compression of penalty transaction](#no-compression-of-penalty-transaction)
 
 ## Watchtower discovery