fix(mdns): answer hostname A queries after TTL (#96)

* fix(mdns): answer hostname A queries after TTL

Zeroconf answers only service queries. The A record for <alias>.local
expired from the OS cache after 120 seconds and lookups then failed.

Vendor zeroconf v1.0.0 with one change: it now answers A and AAAA
queries for the registered hostname. Fixes #95.

* fix(deps): update golang.org/x/net to v0.60.0

govulncheck reports several x/net advisories fixed in v0.60.0.
The Security Scan job fails on them.

go.mod

@@ -62,7 +62,7 @@ require (
 	github.com/xo/terminfo v1.2.0 // indirect
 	go.yaml.in/yaml/v2 v2.4.4 // indirect
 	go.yaml.in/yaml/v3 v3.0.5 // indirect
-	golang.org/x/net v0.59.0 // indirect
+	golang.org/x/net v0.60.0 // indirect
 	golang.org/x/oauth2 v0.37.0 // indirect
 	golang.org/x/sync v0.23.0 // indirect
 	golang.org/x/sys v0.48.0 // indirect
@@ -80,3 +80,5 @@ require (
 	sigs.k8s.io/structured-merge-diff/v6 v6.4.2 // indirect
 	sigs.k8s.io/yaml v1.6.0 // indirect
 )
+
+replace github.com/grandcat/zeroconf => ./third_party/zeroconf