[http-client] Reset base if an http scheme is detected

[SentryMan]

now if we do something like:

  @Override
  public Titan titanfall() {
    return client.request()
      .path("https://something.com").path(DROP_POINT)
      .GET()
      .bean(Titan.class);
  }

the base URL will be switched to https://something.com.

• path will reset the URL buffer if an HTTP scheme is detected in the given string