Add option to not make publicly joinable channels public on Matrix. Fixes #128

example-config.yaml

@@ -98,6 +98,8 @@ bridge:
     # Only enable this if your displayname_template has some static part that the bridge can use to
     # reliably identify what is a plaintext highlight.
     plaintext_highlights: false
+    # Whether or not to make portals of publicly joinable channels/supergroups publicly joinable on Matrix.
+    public_portals: true
 
     # The prefix for commands. Only required in non-management rooms.
     command_prefix: "!tg"