binlogctl failed to parse pd-urls

[july2993]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do?

./binlogctl -pd-urls="http://12.12.12.12:2379" -cmd pumps

2. What did you expect to see?
   work normally

3. What did you see instead?

2020/03/04 17:57:31 main.go:39: [error] parse cmd flags, error: parse EtcdURLs error: http://12.12.12.12:2379, address http://12.12.12.12:2379: too many colons in address

4. Please provide the relate downstream type and version of drainer.
   (run drainer -V in terminal to get drainer's version)
   2.1.19