- Better handling of 504 gateway timeout
     (keep going up to limit of retry count rather
      than just one more partial fetch)
   - Add -t cmd line option for timeout
   - Better handling of 403, 409, 503 errors
   - Don't keep going after unknown return code
   - Don't delay before exiting after a failure

      - Add i2cp.gzip option (default true)
      - Don't bother compressing if really small

      when the initial data is larger than one MTU,
      e.g. HTTP GETs with large URLs, CGI params or cookies,
      or large HTTP POSTS:
      - Don't reject additional packets received without a
        send stream ID (i.e. sent before the SYN ACK was received)
      - Put unknown non-SYN packets on the SYN queue also
        so they won't be rejected
      - Reduce flusher delay to 250ms (was 500)
      - Flush unless window is full (was window is non-empty)

      - Add a signed Certificate type
      - Add a main() to PrivateKeyFile to generate
        Destinations with various Certificate types
      - Add a VerifiedDestination class to check Certificates
        of various types
      - Add a HashCash library from http://www.nettgryppa.com/code/
        (no distribution restrictions)
      - Allow non-null Certificates in addressbook

    * i2psnark: Add codevoid link, remove mastertracker
    * hosts.txt: add echelon, codevoid

    * configpeer.jsp: Add blocklist info
    * help.jsp: Add link to German FAQ
    * tunnels.jsp: Fix inactive participating count

      code from 3 checkins ago
    * tunnels.jsp: Sort participating tunnels by usage, display rate

    * Tunnels:
      - Add missing message accounting for inbound gateways,
        we were underestimating participating traffic because of it,
        and the tunnels were classified "inactive"
      - Add participating tunnel role on tunnels.jsp

      - Correctly check inbound and outbound total bw limits separately
      - Fix up and actually use the tunnel.participatingMessageCount stat,
        favor it if lower than the total bw stat, so that
        client traffic isn't included for throttle decisions
      - Reduce min message count from 60 to 40
    * Tunnel Dispatcher:
      - Add tunnel.participatingBandwidth stat
      - Remove all 3h and 24h stats

    * configlogging.jsp: Increase box width

    * NetDb: Add netDb.exploreKeySet stat
    * netdb.jsp: Add parameter ?r=xxxxxx to view a single routerinfo,
      and ?r=. to view our own; change links on other pages too

    * UpdateHandler: Cleanup, clarify failure message

    * Tunnel BuildExecutor: Debug cleanup

      peer for direct RouterInfo stores, to mimimize floodfill
      connections
    * Peer Profiles: Classify connected peers as "active",
      which will help improve the fast pool
    * Transport Manager: Add isEstablished(Hash)

      so floodfill routers don't get backed up

    * NTCP: Add connection limit, set by i2np.ntcp.maxConnections,
      default is 500 (very high for now)

      (thanks devzero!)

      - Avoid peers whose netdb is old, or have a recent failed store,
        or are forever-shitlisted

      - New, disabled by default, except for blocking of
        forever-shitlisted peers. See source for instructions
        and file format.
    * Transport - Reject peers from inbound connections:
      - Check IP against blocklist
      - Check router hash against forever-shitlist, then block IP

      - Try to pick better introducers by checking shitlist,
        wasUnreachable list, failing list, and idle times
      - To keep introducer connections up and valid,
        periodically send a "ping" (a data packet with no data and no acks)
        to everybody that has been an introducer in the last two hours
      - Add a stat udp.receiveRelayRequestBadTag, make udp.receiveRelayRequest only for good ones
      - Remove some 60s and 5m stats, leave only the 10m ones
      - Narrow the range for the retransmit time after an allocation fail
      - Adjust some logging

      - Try to fix 100% CPU, caused perhaps by JVM NIO bug...
      - Fix failsafe stats

    * Summary bar:
      - Display Warning for TCP private IP address
      - Display PRNG stats

      Saves are not yet implemented.

      startup, so peers don't list us as failing.

      floodfills, and automatically enables/disables floodfill on
      Class O routers to maintain 5-7 total active floodfills