sockets found while reporting closed sockets (to avoid deadlock);
remove sockets from crefmgr's map when closing them so new connections
using same (re-used) socket aren't treated as belonging to open games.
to returing values for string keys so adding a new config doesn't mean
modifying that class. Then add new config for addr passed to bind so
relay can be run to accept http connections from remote machines.
lock. (This bug has always been there, but didn't matter before;
maybe pthreads changed.) Comment out self-spawning stuff until can
fix df-transfer problems. Other minor changes around logging.
send player counts, local and expected. Based on these the relay
accepts connections, declares the game full and ready for message
forwarding, and decides whether to accept a reconnect.
scheme where cookie is used only to connect, and is replaced for
reconnects by a relay-generated name that's supposed to be unique
across all games on all relays and includes a hostname read in from
config file; relay assign non-servers' hostIDs.
