Replaced remnants of TimeoutAffix and its logic with proper application-layer timeouts using the sockettimeout library.
Removed scratch code of 8955c89809f538a595f6a98414546b5cc5a9d838; completed the unit test so that advertisement is used by both server and client to announce/look up Affix stacks via a CoordinationAffix; added documentation on what is going on behind the scenes (checks, setups, relays, advertisement).