#1989 Add disable app registry (#1993)

* Bump to v20.12

* Update Changelog

* Add disable app registry

* squash

sanic/app.py

@@ -50,6 +50,7 @@ class Sanic:
         strict_slashes=False,
         log_config=None,
         configure_logging=True,
+        register=None,
     ):
 
         # Get name from previous stack frame
@@ -88,7 +89,11 @@ class Sanic:
         # Register alternative method names
         self.go_fast = self.run
 
-        self.__class__.register_app(self)
+        if register is not None:
+            self.config.REGISTER = register
+
+        if self.config.REGISTER:
+            self.__class__.register_app(self)
 
     @property
     def loop(self):

sanic/config.py

@@ -40,6 +40,7 @@ DEFAULT_CONFIG = {
     "PROXIES_COUNT": None,
     "FORWARDED_FOR_HEADER": "X-Forwarded-For",
     "FALLBACK_ERROR_FORMAT": "html",
+    "REGISTER": True,
 }