Improve DataMessage.toString()

I2CP: Don't require privkeys for meta in CLS2 message

Fix error sending large message
Fix NPE after handshake failure

Change from 60s DHS to 60m DBF
Use reply key as filter key, not first part of
encrypted data, to match the specs and hopefully reduce dups
BuildMessageProcessor cleanups
log and stat tweaks
remove deprecated methods
remove some timing measurements
javadocs

omits SAM, BOB, reflection, commented-out code, and a few other places

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

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

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

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

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