- Update function definitions.
- Ensure that the datalen always describes the length after the IPv6 header consistently, not matter which protocol us used for probes..
- Document that the default length is 20, not 12.
- Don't send inormation in probe packets which is not needed or even checked when the responses are processed.
- Address CID 978587.
This is mainly a cleanup preparing the addition of SCTP and TCP
as possible probe packet protocols.
MFC after: 4 weeks