move relay selection strategy out of line

p2p/host/relay/autorelay.go

@@ -132,9 +132,7 @@ func (h *AutoRelayHost) findRelays(ctx context.Context) {
 		return
 	}
 
-	// TODO better relay selection strategy; this just selects random relays
-	//      but we should probably use ping latency as the selection metric
-	shuffleRelays(pis)
+	pis = h.selectRelays(pis)
 
 	update := 0
 
@@ -171,6 +169,13 @@ func (h *AutoRelayHost) findRelays(ctx context.Context) {
 	}
 }
 
+func (h *AutoRelayHost) selectRelays(pis []pstore.PeerInfo) []pstore.PeerInfo {
+	// TODO better relay selection strategy; this just selects random relays
+	//      but we should probably use ping latency as the selection metric
+	shuffleRelays(pis)
+	return pis
+}
+
 func (h *AutoRelayHost) updateAddrs() {
 	h.doUpdateAddrs()
 	h.PushIdentify()