Bug fix---better support for Windows
User oviano on Github reported issues with compiling the code under Windows using a compiler other than MinGW. After some back and forth, it seems that MinGW uses <wspiapi.h>, but others (or just the compiler oviano was using) needs <ws2tcpip.h>. This is the minimum change required to meet both oviano's and alperakcan's use cases.
alperakan
https://github.com/spc476/SPCDNS/pull/7
oviano
https://github.com/spc476/SPCDNS/pull/12