This matches their use throughout the rest of the project, and fixes the
build when you are cross-compiling on Linux using mingw-w64. i.e:
CC epoll.lo
CC wepoll.lo
CC signal.lo
wepoll.c:138:10: fatal error: WS2tcpip.h: No such file or directory
#include <WS2tcpip.h>
^~~~~~~~~~~~
compilation terminated.
make[2]: *** [Makefile:1918: wepoll.lo] Error 1
#pragma warning(push, 1)
#endif
-#include <WS2tcpip.h>
-#include <WinSock2.h>
-#include <Windows.h>
+#include <ws2tcpip.h>
+#include <winsock2.h>
+#include <windows.h>
#ifndef __GNUC__
#pragma warning(pop)