fix: stop mDNS goodbyes on iface churn and keep ads visible - #10
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Refresh advertisements with register() only so netlink/DHCP events no longer emit TTL 0. Filter and debounce rtnetlink, re-announce on a 55 s ticker, and add doctor/selfcheck plus `make deploy` onto /data. Co-authored-by: Cursor <cursoragent@cursor.com>
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Why
Hub mDNS was disappearing from client caches: every rtnetlink event ran
unregister+register, which sent goodbye (TTL 0) and then never re-announced. Wireless-programmer activity onwlan0was enough to wipebigfred._http._tcp.local.What
wlan*on the hub).microdns doctor.make deploybuilds musl arm64 and copies the binary to/data/opt/microdnson192.168.0.1.Companion OS change: dcc-bigfred/bigfred-os
feat/microdns-data-override(init prefers/data, lower restartBackoff, tcpdump).Test plan
cargo test --offlinecargo clippy --offline --all-targets -- -D warningsmake deploy, thenmicrodns doctorand confirm no TTL 0 except on real service removal; service stays as visible as Railbox.