- Generate and parse short record format
- Encrypt and decrypt short records
- Register handlers for 3 new messages ITBM/STBM/OTBRM
- Send ITBM/STBM if all hops support it (disabled)
- Reply with OTBRM at OBEP if STBM received (disabled)
- Send STBM at IBGW if ITBM received (disabled)
- Add logic for when to send new messages
- ChaCha encryption of other short records
- Fix compare logic in ITBM parser (ticket #2814)

All is still preliminary, disabled, untested; proposal is still incomplete

Still todo:
- Fill in plaintext record for ITBM/OTBRM
- OTBRM key/tag

Rename ShortTunnelBuildReplyMessage to OutboundTunnelBuildReplyMessage (type 26)
Add InboundTunnelBuildMessage (type 27)
Add methods for plaintext record
Update readMessage() and writeMessageBody()
Fix calculateWrittenLength()
Update javadocs
WIP, untested, not hooked in yet

WIP - not hooked in yet

Extend lookup expire time
Cleanups

- Change router ECIES SKM to use N pattern, remove Elligator2, to match proposal changes
- Allow encrypted messages to ECIES routers
- Allow ECIES routers to become floodfill
- Add XDH factory to VM comm system for tests

The #ls2 team plans to change the specification and re-enable after the 0.9.48 release

Fixup test as required

Additional checks on ECIES BRR to catch old/buggy routers
Detailed logging of ECIES BRR decrypt fails

Preliminary, proposal not finalized, subject to change
Not yet compatibility tested with other implementations
Add peers to match requested length for explicitPeers
remove commented out code
log tweaks

Tag.toBase64() optimization
Javadoc fixes

Pass CloveSet to/from ECIESEngine

Improve DataMessage.toString()

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

minor efficiency improvements in parsing