update changelog and doc string. django now throws a ModuleNotFound error when it's config can't be found. Catch it.

CHANGELOG.md

@@ -55,6 +55,8 @@
 
 * Signatures are not verified and the corresponding payload is dropped if no public key is found.
 
+* Sign forwarded AP replies and shares with the target content author's private key. 
+
 ### Internal changes
 
 * Dropped python 3.6 support.

federation/outbound.py

@@ -132,7 +132,10 @@ def handle_send(
                      ]
     :arg parent_user: (Optional) User object of the parent object, if there is one. This must be given for the
                       Diaspora protocol if a parent object exists, so that a proper ``parent_author_signature`` can
-                      be generated. If given, the payload will be sent as this user.
+                      be generated. If given, the payload will be sent as this user. For Activitypub, the
+                      parent_user's private key will be used to generate the http signature if the author_user
+                      is not a local user.
+
     :arg payload_logger: (Optional) Function to log the payloads with.
     """
     payloads = []

federation/utils/django.py

@@ -23,7 +23,7 @@ def get_configuration():
     }
     try:
         configuration.update(settings.FEDERATION)
-    except ImproperlyConfigured:
+    except (ModuleNotFoundError, ImproperlyConfigured):
         # Django is not properly configured, return defaults
         return configuration
     if not all([