Allow restoring bridge pass (Lox credentials) with the same invite
We want to support the following in Tor Browser:
- A user redeems an invite to get new lox credentials.
- Later, they remove the Lox bridges.
- The user re-inputs the same invite.
In this case, we should restore their credentials after step 3 using our Lox cache. Bypassing the Lox authority.
@donuts or @cohosh, do you see any potential problems with allowing this?