I've removed "netinet/in.h" header check on Windows platform, since it absent.
Current check always failed leaving IPv6 support disabled in result build.
Build tested with MSVC++ 2013/MinGW gcc 5.1
@bradking could you please review?
cmake: IPv6 : disable Unix header check on Windows platform
@bradking do you have some time to take a look on change? Thank you!
Sorry for the delay, I've been out of the office.