1. Support boost 1.87
2. New RTO and window size calculation and resetting algorithm for streams
3. Faster LeaseSet amd RouterInfo lookups
4. Direct link between tunnel and transport to next peer
5. Separate thread for tunnel build requests
6. Fixed missing RouterInfo buffer in NetDb
7. Throttle incoming ECIESx25519 sessions
8. Check LeaseSet expiration time
9. Resend HolePunch and RelayResponse messages
10. Publish 'R' cap for yggdrasil-only routers, and 'U' cap for routers through proxy
11. New "i2p.streaming.maxConcurrentStreams" tunnel's param to limit number of simultaneous streams
12. Don't delete routers from NetDb when offline
13. Save unreachable router's endpoint to use it next time without introducers
14. Random tunnel rejection when medium congestion
15. Increased hole punch expiration interval
16. Handle NTCP2 session handshakes in separate thread