to branch 'i2p.i2p' (head 376f751adc13923cdbf4f659c3f23ca957cf47b3)

fix tooltips on images

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 * UPnP: Catch reported error on FreeBSD

IMS PartialBitfield tweaks
Log tweaks

  - Add method to return an unused keypair to the pool

  - Prep for future enhancements by refactoring to a state machine model
  - Reduce object churn; use SimpleByteCache
  - Synchronization
  - Define some constants
  - More finals
  - Log tweaks

uk), and English po file updates

Updates to geoip.txt and geoipv6.dat.gz based on the Maxmind GeoLite Country
database from 2014-09-04.

  - Forward port from trunk: Don't send HTML-only headers for icons (2nd try)
  - Consolidate HTML header code
  - Set no-cache headers
  - Don't set HTML headers for redirects

  - Move from core to RouterKeyGenerator in router.jar
  - Leave RoutingKeyGenerator as a simple abstract class
  - DatabaseEntry now uses timestamp instead of mod data
    to determine if mod data has changed. Don't expose
    mod data to DatabaseEntry any more.
  - I2PAppContext.routingKeyGenerator() now returns null;
    you must be in RouterContext to get a generator.

- Fix IB ACKBitfield.highestReceived()
- More efficient OMS.acked()
- Log tweaks

- Add ACKBitfield.highestReceived() for efficiency
- Only write as many partial bitfield bytes as required,
  rather than 10 (for 64 bits) every time.
- Don't allow more than 10 bytes when reading in bitfield
- Don't send an extra byte if (fragments % 7) == 0
- Don't send a corrupt ack packet if the partial ack got completed (race)
- Log tweaks

Rewrite PartialBitfield for efficiency, less space and object churn
SSU ACKBitfield: Add ackCount()
PeerState.fetchPartialACKs() improvements

Fix SSU Output Queue errors due to races with PacketBuilder:
   - Remove all buffer caching as it can't be made thread-safe.
     Just allocate buffer in constructor and let GC handle it
   - Do fragmenting in constructor and make all fragment fields final
   - Don't track per-fragment retransmissions as it wasn't used
   - Move ack tracking from an array to a long
   - Sync all ack methods
   - Entire class now thread-safe (thx dg)