It turns out I was able to implement this switch without any such kludge,
merely by persisting the whole /var/lib/tca directory.

network_connection.md

@@ -634,8 +634,3 @@ Alternative UX with or without the Persistent Storage redesign (tails/tails#1152
         To save your bridges, [create a Persistent Storage](https://tails.boum.org/doc/first_steps/persistence) on your Tails USB stick.
 
   * We might add or not add a switch to the Persistent Storage settings.
-
-    This would require intrigeri to add Perl backend to reflect the existence
-    of a `bridges.conf` configuration file instead of a mount point, as of now.
-    We can live without this and only offer switches in the Tor Configuration
-    assistant.