untested

 - Support arbitrary location for torrent data. Save location in
   per-torrent config file. TODO: Fix torrent browse pages
   (ticket #1028)
 - Enhance idle shutdown message
 - Javadocs

   - Fix (again) partial piece avoidance for seeds
   - Fix several partial piece (temp file) leaks,
     some uncovered by previous rarest-first fixes, some in end game
   - Don't lose all DHT peers if we stop quickly (backport from update branch)
   - Explore a kbucket if it's less than 3/4 full (backport from update branch)

   - Reduce TrackerClient threads
   - Reduce delay between peer adds for faster startup
   - Thread the announces and reduce timeout when stopping

- Change DHT from option bit to extension message
- Add DHT start/stop code
- Add UI for DHT enabling
- Add raw datagram protocol type and use for response port

   - Store received chunks in temp files
   - Don't allocate from heap for unneeded chunks
   - Remove peer count restriction for torrents with large pieces
   - Use priorities and rarest calculations to sort partials
   - Preserve p parameter in clear messages link

Handle announce URLs with parameters correctly

- Better BEValue.toString()

(most of the following got missed in the last checkin)
- Fix about 9 NPEs
- Fix numwant in magnet mode
- Send metadata size in extension handshake
- Open trackers are primary if we don't have primary trackers
- Add missing break in port message handling
- Increase max msg size to account for metadata msg
- Remember magnets across restarts
- Drop peers w/o extensions if we need metainfo
- Fix DATA messages
- Fix tracker transition to non-magnet
- Fix infohash for non-magnet
- Fix up peer transition to non-magnet
- More logging

- Record the metadata bandwidth
- More null announce handling
- Callbacks for got MetaInfo event
- Cleanups

      - Fix NPE and other partials bugs
      - More extension message stubbing
      - Log tweaks

      - Drop queued outbound requests when choked
      - Redo some data structures and locking to hopefully prevent deadlock
      - Memory reduction part 3: Return partial pieces to PeerCoordinator when choked

                in preparation for more improvements

      - Prevent dup requests during end game
        (ticket 331 - thanks sponge and Oct!)

      - Defer piece loading until required
      - Stub out Extension message support

      - Limit number of parallel requests of a single piece when in the end game
      - Shorten and weight the speed tracker so the display is more
        reflective of current speed

- Make sure lastRequest is null when it should be
- Logging tweaks

      - Don't stay interested if we run out of pieces
        to request (thanks sponge)
      - Enhance debug mode to show requests

      - Change file limit to 512 (was 256)
      - Change size limit to 10GB (was 5GB)
      - Change request size to 16KB (was 32KB)
      - Change pipeline to 5 (was 3)

      (thanks devzero!)

    * TunnelPeerSelectors:
       - Re-enable strict ordering of peers,
         based on XOR distance from a random hash
       - Restrict peers with uptime < 90m from tunnels (was 2h),
         which is really 60m due to rounding in netDb publishing.
    * i2psnark:
       - Limit max pipelined requests from a single peer to 128KB
         (was unlimited; i2p-bt default is 5 * 64KB)
       - Increase max uploaders per torrent to 6 (was 4)
       - Reduce max connections per torrent to 16 (was 24) to increase
         unchoke time and reduce memory consumption
       - Strictly enforce max connections per torrent
       - Choke more gradually when over BW limit
    * help.jsp: Add a link to the FAQ
    * peers.jsp: Fix UDP direction indicators
    * hosts.txt: Add update.postman.i2p