webrtc.NewIceServer already does this split / validation

It also expects to be called with a non-empty string, which isn't
the case with this Split which always envokes the loop at least
once.  If -ice was omitted, an error was logged.

client/snowflake.go

@@ -145,11 +145,8 @@ func main() {
 	log.Println("\n\n\n --- Starting Snowflake Client ---")
 
 	var iceServers IceServerList
-	log.Println("IceServerList:")
-	for _, server := range strings.Split(*iceServersCommas, ",") {
-		// TODO: STUN / TURN url format validation?
-		log.Println(server)
-		option := webrtc.OptionIceServer(server)
+	if len(strings.TrimSpace(*iceServersCommas)) > 0 {
+		option := webrtc.OptionIceServer(*iceServersCommas)
 		iceServers = append(iceServers, option)
 	}