NetDb: Drop all-zero lookups and stores, add stats
SSU:
 - Fix debug logging of dumped packets
 - Drop sessions with bad clock skew, banlist peer, add stats
 - Drop sessions with corrupt DSM, banlist peer, add stats
Log tweaks

- FloodfillMonitorJob:
  - Use avg of router.tunnelBacklog instead of current backlog
- Some language/spelling fixes

to reduce object churn, we only need one
Add DeliveryInstructions.create() to return immmutable
local instructions, to reduce object churn
Minor cleanups

Remove meeh.i2p as update host (ticket #1515)
Re-add 193.xxx https reseed
Fix SocketManagerFactory property handling
Restore UPnP locale fix lost in the merge
i2ptunnel finals
I2NP unique id fixes
duplicate done() in ReseedChecker
bigger langbox in CSS
reformatting
Javadocs

- RI javadoc clarifications WRT caps

in case we ever want to use them for options

Move some data structures away from ByteArray; offsets were always zero
  - New BuildRequestRecord constructors
  - BuildRequestRecord field becomes final byte[222]
  - IV becomes byte[16]
  - Build record becomes EncryptedBuildRecord
Remove extra copy in BuildRequestRecord.encryptRecord()
Remove unused BuildRequestRecord.readOurIdentityMatches()

- Set lookup type flags even if no reply tunnel specified
- Reduce object churn when writing some messages

whether specified in the caps or the cert

to replace all-zeros hash, and ease implementation for
separate LS and RI databases, as documented in i2np spec.

  - 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.

BuildRequestor: Randomize timestamp to prevent hop ID at top of hour

 - Verify crypto key pair in LS
 - Verfiy same dest as before in LS
Router: Don't try to use an unavailable sig type for the router,
   even if it's the default
RouterInfo: Work around unsupported raw signatures for
   RI Ed25519 sig type

Router: Validate router key pairs read in from file

Router:
 - Use eepPriv.dat format for router keys file (thx orignal)
 - Consolidate router keys readin code
 - Update killKeys file list
RouterPrivateKeyFile: New extension to add getRouterIdentity()

 - 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

   - Cleanup, reduce object churn, comment out unused code
   - Limit max cloves to 32

 - Overrides in GarlicConfig/PGC for efficiency and clarity
 - Check for valid ID in DeliveryStatusMessage
 - Misc. log tweaks, javadocs, cleanups

  - Comment out unused encryption fields to save space
  - New static immutable LOCAL instruction to reduce object churn