Use DNS instead of IP

[lanesCSO]

When trying to use a FQDN instead of IP we are unable to get the uptime or use memcache.

[cnblogs-dudu]

Please provide an example reproducing the issue.

[lanesCSO]

TimeSpan upTime;

if (IsValidIpAddress(address))
{
  upTime = stats.GetUptime(new IPEndPoint(IPAddress.Parse(address), int.Parse(port)));
}
else
{
  IPAddress[] addresses = Dns.GetHostAddresses(address);
  var addr = addresses[0];
  var ip = IPAddress.Parse(addresses[0].ToString());
  upTime = stats.GetUptime(new IPEndPoint(ip, int.Parse(port)));
}

public static bool IsValidIpAddress(string ipString)
{
return IPAddress.TryParse(ipString, out _);
}