add relay proxy

pkg/listener/option.go

@@ -1,13 +1,11 @@
 package listener
 
 import (
-	"github.com/go-gost/gost/pkg/chain"
 	"github.com/go-gost/gost/pkg/logger"
 )
 
 type Options struct {
 	Addr   string
-	Chain  *chain.Chain
 	Logger logger.Logger
 }
 
@@ -19,12 +17,6 @@ func AddrOption(addr string) Option {
 	}
 }
 
-func ChainOption(chain *chain.Chain) Option {
-	return func(opts *Options) {
-		opts.Chain = chain
-	}
-}
-
 func LoggerOption(logger logger.Logger) Option {
 	return func(opts *Options) {
 		opts.Logger = logger