add pkgs from core

handler/forward/remote/metadata.go

@@ -0,0 +1,21 @@
+package remote
+
+import (
+	"time"
+
+	mdata "github.com/go-gost/core/metadata"
+	mdx "github.com/go-gost/x/metadata"
+)
+
+type metadata struct {
+	readTimeout time.Duration
+}
+
+func (h *forwardHandler) parseMetadata(md mdata.Metadata) (err error) {
+	const (
+		readTimeout = "readTimeout"
+	)
+
+	h.md.readTimeout = mdx.GetDuration(md, readTimeout)
+	return
+}