Add multicast interfaces to platform-specific defaults (this makes it easier to avoid bringing AWDL up by default on macOS as an example, or over L2 VPNs when not expected)

src/defaults/defaults_darwin.go

@@ -12,6 +12,12 @@ func GetDefaults() platformDefaultParameters {
 		// Configuration (used for yggdrasilctl)
 		DefaultConfigFile: "/etc/yggdrasil.conf",
 
+		// Multicast interfaces
+		DefaultMulticastInterfaces: []string{
+			"en*",
+			"bridge*",
+		},
+
 		// TUN/TAP
 		MaximumIfMTU:     65535,
 		DefaultIfMTU:     65535,