plumb through STUNBatch function from the outbound options

Author: noahlevenson

option/unbounded.go

@@ -23,6 +23,7 @@ type UnboundedOutboundOptions struct {
 	GenesisAddr       string `json:"genesis_addr,omitempty"`
 	NATFailTimeout    int    `json:"nat_fail_timeout,omitempty"`
 	STUNBatchSize     int    `json:"stun_batch_size,omitempty"`
+	STUNBatch         func(size uint32) (batch []string, err error)
 	Tag               string `json:"tag,omitempty"`
 	Patience          int    `json:"patience,omitempty"`
 	ErrorBackoff      int    `json:"error_backoff,omitempty"`

protocol/unbounded/outbound.go

@@ -92,6 +92,10 @@ func NewOutbound(
 		rtcOpt.STUNBatchSize = uint32(options.STUNBatchSize)
 	}
 
+	if options.STUNBatch != nil {
+		rtcOpt.STUNBatch = options.STUNBatch
+	}
+
 	if options.Tag != "" {
 		rtcOpt.Tag = options.Tag
 	}