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
  move plugin support into writerpipeline to support sync
  increase DB version
  update list of supported NIPs
  update docs

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