Refactoring

Refactored Protocol.Name -> Protocol.Type; added Encapsulation field
Refactored TLS parsing; added support for ALPN

cmd/protodial/main.go

@@ -42,11 +42,11 @@ func main() {
 		if p == nil {
 			return errors.New("no protocol detected")
 		}
-		if !accept[p.Name] {
-			return fmt.Errorf("protocol %s is not accepted", p.Name)
+		if !accept[p.Type] {
+			return fmt.Errorf("protocol %s is not accepted", p.Type)
 		}
 		fmt.Fprintf(os.Stderr, "Accepting protocol %s version %s initiated by %s\n",
-			p.Name, p.Version, dir)
+			p.Type, p.Version, dir)
 		return nil
 	})
 	defer func() { _ = c.Close() }()