selector: add filters to replace depricated client/selector filters (#1785)

selector/selector.go

@@ -21,7 +21,7 @@ type Selector interface {
 	// Options the selector is using
 	Options() Options
 	// Select a route from the pool using the strategy
-	Select([]router.Route) (*router.Route, error)
+	Select([]router.Route, ...SelectOption) (*router.Route, error)
 	// Record the error returned from a route to inform future selection
 	Record(router.Route, error) error
 	// Close the selector
@@ -30,12 +30,6 @@ type Selector interface {
 	String() string
 }
 
-// Options used to configure a selector
-type Options struct{}
-
-// Option updates the options
-type Option func(*Options)
-
 // NewSelector creates new selector and returns it
 func NewSelector(opts ...Option) Selector {
 	return newSelector(opts...)