use saved static nameservers stored for the default router interface when doing nameserver discovery

fix bad logger usages

patch darwin interface name

patch darwin interface name, debugging

make resetDNS check for static config on startup, optionally restoring static confiration as needed

fix netmon logging

resolver.go

@@ -549,6 +549,11 @@ func lookupIP(domain string, timeout int, withBootstrapDNS bool) (ips []string)
 //   - Gateway IP address (depends on OS).
 //   - Input servers.
 func NewBootstrapResolver(servers ...string) Resolver {
+	logger := zerolog.New(io.Discard)
+	if ProxyLogger.Load() != nil {
+		logger = *ProxyLogger.Load()
+	}
+	Log(context.Background(), logger.Debug(), "NewBootstrapResolver called with servers: %v", servers)
 	nss := defaultNameservers()
 	nss = append([]string{controldPublicDnsWithPort}, nss...)
 	for _, ns := range servers {
@@ -565,6 +570,13 @@ func NewBootstrapResolver(servers ...string) Resolver {
 //
 // This is useful for doing PTR lookup in LAN network.
 func NewPrivateResolver() Resolver {
+
+	logger := zerolog.New(io.Discard)
+	if ProxyLogger.Load() != nil {
+		logger = *ProxyLogger.Load()
+	}
+	Log(context.Background(), logger.Debug(), "NewPrivateResolver called")
+
 	nss := defaultNameservers()
 	resolveConfNss := nameserversFromResolvconf()
 	localRfc1918Addrs := Rfc1918Addresses()
@@ -609,6 +621,11 @@ func NewResolverWithNameserver(nameservers []string) Resolver {
 // newResolverWithNameserver returns an OS resolver from given nameservers list.
 // The caller must ensure each server in list is formed "ip:53".
 func newResolverWithNameserver(nameservers []string) *osResolver {
+	logger := zerolog.New(io.Discard)
+	if ProxyLogger.Load() != nil {
+		logger = *ProxyLogger.Load()
+	}
+	Log(context.Background(), logger.Debug(), "newResolverWithNameserver called with nameservers: %v", nameservers)
 	r := &osResolver{}
 	var publicNss []string
 	var lanNss []string