initial commit

TODO

@@ -0,0 +1,25 @@
+features
+  finish syncing
+    * logging of bytes up/down
+    * up/both directions
+    * error handling and reporting
+    * way to close sync request
+    * limit on number of concurrent sync requests
+    * full-db scan limited by since/until
+  config for compression
+  less verbose default logging
+  nice new config "units" feature, is 1d instead of 86400
+  make it easier for a thread to setup a quadrable object
+  opt: PubkeyKind scans could be done index-only
+
+rate limits
+  slow-reader detection and back-pressure
+  max connections per ip (nginx?)
+  max bandwidth up/down (nginx?)
+  event writes per second per ip
+  max number of concurrent REQs per connection/ip
+  ? limit on total number of events from a DBScan, not just per filter
+
+misc
+  periodic reaping of disconnected sockets
+  ? websocket-level pings