Recommend 4,0 enc type for I2CP
https Noise links

other minor fixes

- Change Noise name
- Change message 1 options version field to 1 byte
- Increase message 2 options to 16 bytes and move fields to be consistent with message 1
- Change SipHash KDF
- Publish firewalled NTCP2 s and v parameters in RA, not RI
- Spellcheck, consistency, cleanups, typos

SAMv3 minor clarification

Proposal 111 updates