Extended Embargo feature to support site access restriction and ip network

lms/envs/common.py

@@ -228,6 +228,9 @@ FEATURES = {
     # Toggle embargo functionality
     'EMBARGO': False,
 
+    # Toggle embargo site functionality
+    'EMBARGO_SITE': False,
+
     # Whether the Wiki subsystem should be accessible via the direct /wiki/ paths. Setting this to True means
     # that people can submit content and modify the Wiki in any arbitrary manner. We're leaving this as True in the
     # defaults, so that we maintain current behavior