Add Fake DNS support (#309)

Co-authored-by: Xiaokang Wang <xiaokangwang@outlook.com>
Co-authored-by: loyalsoldier <10487845+Loyalsoldier@users.noreply.github.com>
Co-authored-by: kslr <kslrwang@gmail.com>

main/distro/all/all.go

@@ -16,6 +16,7 @@ import (
 
 	// Other optional features.
 	_ "github.com/xtls/xray-core/app/dns"
+	_ "github.com/xtls/xray-core/app/dns/fakedns"
 	_ "github.com/xtls/xray-core/app/log"
 	_ "github.com/xtls/xray-core/app/policy"
 	_ "github.com/xtls/xray-core/app/reverse"