Add secure option to registry

registry/options.go

@@ -8,6 +8,7 @@ import (
 
 type Options struct {
 	Timeout time.Duration
+	Secure  bool
 
 	// Other options for implementations of the interface
 	// can be stored in a context
@@ -19,3 +20,10 @@ func Timeout(t time.Duration) Option {
 		o.Timeout = t
 	}
 }
+
+// Secure communication with the registry
+func Secure(b bool) Option {
+	return func(o *Options) {
+		o.Secure = b
+	}
+}