Update webhook configuration

docs/strategy_migration.md

@@ -41,6 +41,18 @@ You can use the quick summary as checklist. Please refer to the detailed section
   * `order_time_in_force` buy -> entry, sell -> exit.
   * `order_types` buy -> entry, sell -> exit.
   * `unfilledtimeout` buy -> entry, sell -> exit.
+* Terminology changes
+  * Sell reasons changed to reflect the new naming of "exit" instead of sells. Be careful in your strategy if you're using `exit_reason` checks.
+    * `sell_signal` -> `exit_signal`
+    * `custom_sell` -> `custom_exit`
+    * `force_sell` -> `force_exit`
+    * `emergency_sell` -> `emergency_exit`
+  * Webhook terminology changed from "sell" to "exit".
+    * `webhooksell` -> `webhookexit`
+    * `webhooksellfill` -> `webhookexitfill`
+    * `webhooksellcancel` -> `webhookexitcancel`
+
+
 
 ## Extensive explanation