BIP155 follow-ups

Summary:

Mention BIP155 in doc/bips.md

Only relay IPv4, IPv6, Tor addresses

This is a backport of core#20119

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D10438