Docs: shared checkout model, /etc/vanlink.conf references

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KqhjP7nud5gdBg25zCiRk9

failover/60-van-wan-dns

@@ -3,7 +3,7 @@
 and keep mDNS scoped to the van's own LAN (never a WAN).
 
 This router only resolves via the fixed servers in
-/etc/systemd/resolved.conf.d/99-van-router-dns.conf (deploy.conf's
+/etc/systemd/resolved.conf.d/99-van-router-dns.conf (/etc/vanlink.conf's
 DNS_RESOLVERS) — never whatever a WAN happens to hand out (Wapana, a
 campsite AP, Starlink, cellular). NetworkManager's own ipv4/ipv6.ignore-auto-
 dns can't be set as a config-file connection default: NM rejects it there