Two peers on the same intern network, one started with --hostname
peer-a, resolve and ping each other by name via the per-session dnsmasq
resolver (network_dns.cpp). Skips cleanly when dnsmasq isn't available.
wait_for_hostname_then() retries the whole ping-by-name probe (not just
an eth0 existence check) until it succeeds or the bound is hit, since
this races against two independent things starting concurrently with
the sandboxed command: the interface coming up, and the per-session
resolver picking up the peer's own hosts record -- same underlying
join_networks() timing limitation the earlier wait_for_eth0_then() fix
was for. Verified end-to-end as root, both variants.
ceamac
65c6d8fc03