[Documentation] forwardIP could be a host name

[maxp1256]

According to the documentation forwardIp could only be an IP, but when looking to the source it is read into the parameter remoteServerHostNameOrAddress.

This is a very nice feature when the target ip is changed very often (dyndns) because the built-in netsh portproxy is not able to use dns as a intermediate layer. I think it should be mentioned in the docs!