strfry/TODO

1.0 release
  ! find root cause of "invalid candidate" crash
  support filtering on empty value tags
  test negentropy queries stored in events
  more config params in negentropy
    ? limit for total number of events, not just per filter
  increase DB version

features
  in sync/stream, log bytes up/down and compression ratios
  "router" app, where multiple stream/sync connections handled in one process/config (the "nginx of nostr")
  NIP-42 AUTH
  slow-websocket connection detection and back-pressure
  pre-calcuated tree negentropy XOR trees to support full-db scans (optionally limited by since/until)
    ? maybe just use daily/fixed-size bucketing
  improve delete command
    * delete by receivedAt, IP addrs, etc
    * inverted filter: delete events that *don't* match the provided filter
  ? less verbose default logging
  ? if a client disconnects, delete all its pending write messages
  ? kill plugin if it times out

rate limits (maybe not needed now that we have plugins?)
  event writes per second per ip
  max connections per ip (nginx?)
  max bandwidth up/down (nginx?)
  log IP address in sendNoticeError and elsewhere where it makes sense
  ? events that contain IP/pubkey/etc block-lists in their contents
  ? limit on total number of events from a DBScan, not just per filter
  ? time limit on DBScan

misc
  ? periodic reaping of disconnected sockets (maybe autoping is doing this already)
  ? export not dying on SIGPIPE, or not getting SIGPIPE
  ? why isn't the LMDB mapping CLOEXEC