Allow setting of timeout for registry

registry/options.go

@@ -0,0 +1,15 @@
+package registry
+
+import (
+	"time"
+)
+
+type Options struct {
+	Timeout time.Duration
+}
+
+func Timeout(t time.Duration) Option {
+	return func(o *Options) {
+		o.Timeout = t
+	}
+}