Make provider manager options configurable in fullrt

Implement the ability to configure provider manager options in `fullrt`
DHT client implementation.

fullrt/dht.go

@@ -150,7 +150,7 @@ func NewFullRT(h host.Host, protocolPrefix protocol.ID, options ...Option) (*Ful
 
 	ctx, cancel := context.WithCancel(context.Background())
 
-	pm, err := providers.NewProviderManager(ctx, h.ID(), h.Peerstore(), dhtcfg.Datastore)
+	pm, err := providers.NewProviderManager(ctx, h.ID(), h.Peerstore(), dhtcfg.Datastore, fullrtcfg.pmOpts...)
 	if err != nil {
 		cancel()
 		return nil, err

fullrt/options.go

@@ -6,6 +6,7 @@ import (
 
 	kaddht "github.com/libp2p/go-libp2p-kad-dht"
 	"github.com/libp2p/go-libp2p-kad-dht/crawler"
+	"github.com/libp2p/go-libp2p-kad-dht/providers"
 )
 
 type config struct {
@@ -16,6 +17,7 @@ type config struct {
 	bulkSendParallelism int
 	timeoutPerOp        time.Duration
 	crawler             crawler.Crawler
+	pmOpts              []providers.Option
 }
 
 func (cfg *config) apply(opts ...Option) error {
@@ -86,3 +88,11 @@ func WithTimeoutPerOperation(t time.Duration) Option {
 		return nil
 	}
 }
+
+// WithProviderManagerOptions sets the options to use when instantiating providers.ProviderManager.
+func WithProviderManagerOptions(pmo ...providers.Option) Option {
+	return func(opt *config) error {
+		opt.pmOpts = pmo
+		return nil
+	}
+}