0bef1042ce net: enable v2transport by default (Pieter Wuille)
Pull request description:
This enables BIP324's v2 transport by default (see #27634):
* Inbound connections will auto-sense whether v1 or v2 is in use.
* Automatic outbound connections will use v2 if `NODE_P2P_V2` was set in addr gossip, but retry with v1 if met with immediate failure.
* Manual outbound connections will default to v2, but retry with v1 if met with immediate failure.
It remains possible to run with `-v2transport=0` to disable all of these, and make all outbound and inbound connections v1. It also remains possible to specify the `v2transport` argument to the `addnode` RPC as `false`, to disable attempting a v2 connection for that particular added node.
ACKs for top commit:
stratospher:
ACK 0bef104.
josibake:
reACK 0bef1042ce
achow101:
ACK 0bef1042ce
naumenkogs:
ACK 0bef1042ce
theStack:
ACK 0bef1042ce
willcl-ark:
crACK 0bef1042ce
BrandonOdiwuor:
utACK 0bef1042ce
pablomartin4btc:
re ACK 0bef1042ce
kristapsk:
utACK 0bef1042ce
Tree-SHA512: 3f17a91e318b9304c40c74a7a5b231149f664ae684d13e9739a05be6c05ba9720f3c3c62da6a73ace0ae8ce733f1c8410b211f9fa15694e6a8d28999ab9882d8
3c63c2f324