stub out lookup by IP

requires routerconsole.advanced=true

log timing for /netdb (ticket #1532)

  - 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.

 - New router.sigType config
 - Generate / regenerate router keys based on config
 - New router.keys2 file format for sig types and padding
 - Fix RouterInfo.readBytes() signature verification with sig types
 - Catch unset padding in KeysAndCert.writeBytes()
 - Catch key errors in ReadRouterJob
 - Show RI sig type on /netdb in console
 - Move some things from Router to startup classes
 - Startup classes package private
 - Buffer readin of key files
 - Remove configurability of router.info and router.keys file locations

This will break Android and the i2pcontrol plugin but shouldn't affect anything else.

 - Serializable
 - hashCode()
 - Make DataStructureImpl Serializable (removed from DataStructure in 2005)

 * NetDbRenderer: Adjust debug floodfill estimate
 * StatManager: Don't start thread for an empty config
 * StatisticsManager: Don't publish client tunnel stats
 * Log tweaks

  - Add setting in i2ptunnel server edit page
  - Comment out cert setting on i2ptunnel server edit page
  - Show key type on susidns details page
  - Show key type on LS debug page

 - Just before midnight, flood to new location too so lookups
   don't fail after keyspace rotation (ticket #510)
 - Refactor RoutingKeyGenerator and UpdateRoutingKeyModifierJob
   in support of the above
 - Display next key on LS debug page

  - Add support for country variants (ticket #1133)
  - Refactor data in ConfigUIHelper
Config files: Allow empty values

   - Add new I2CP RequestVariableLeaseSetMessage
   - Send RVLSM if client supports it; handle on client side;
     disabled by default for the moment.
   - Add LeaseSet.getLatestLeaseDate()
   - Check latest, not earliest, date too far in future in KNDF.validate()
   - Check latest date too far in past in KNDF.validate()
   - Only check gateway and tunnel ID for equality in OCMOSJ lease caching to reduce churn
   - Split up KNDF.validate(RI) for efficiency, don't need to check
     signature, netid, etc. before lookups, only on store
   - Remove enforeNetID config
   - Fix major bug causing newer leasesets to be treated as older, and not stored or published
   - Increase max adjustment time of earliest lease
   - TransientDataStore cleanups
   - RouterInfo and LeaseSet equals() speedups

                       is correctly changed just after midnight.

    - Remove synchronization
    - Do not allow contents to change after being set, throw IllegalStateException
    - Do not copy contents out in getters
    - Make options final
    - Add getOption() and getOptionsMap() methods

    avoid "Turkish four i problem"

    * DataHelper: Speed up eq() (Ticket #437)
    * HTTPServer: Strip inbound X-Accept-Encoding header
    * netdb.jsp: HTML fixes
    * Plugins: Log error when console server not found
    * Reseed: Log tweak

               logs.jsp, netdb.jsp, profiles.jsp, stats.jsp