Run an opt-in process for fallback directories

Draft an email requesting that relay operators opt-in their ID and IP as a fallback directory
Convince someone @ torproject.org to send the email to tor-relays
someone @ torproject.org collates responses and adds them to the whitelist
Once we have enough whitelist entries, we merge the whitelisted fallback directories into the code

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information