Add option to DNS server to ignore them when they are not available via an interface network

service/resolver/resolver.go

@@ -67,6 +67,8 @@ type Resolver struct {
 	Search     []string
 	SearchOnly bool
 	Path       string
+	// Special States
+	LinkLocalUnavailable bool
 
 	// logic interface
 	Conn ResolverConn `json:"-"`