Fix for Windows

- "winsock2.h" needs to be included before "windows.h". But if a
  compilation unit include "windows.h" and after "networkTools.h", we
  fails and it is complicated to handle. The include must not be in the
  header but in the cpp
- windows define some ERROR macro. It is a pitty but we cannot use `ERROR`
  in our enum.
- If build statically using mingw we need to define `CURL_STATICLIB`

include/common/networkTools.h

@@ -20,25 +20,8 @@
 #ifndef KIWIX_NETWORKTOOLS_H
 #define KIWIX_NETWORKTOOLS_H
 
-#ifdef _WIN32
-#include <winsock2.h>
-#include <ws2tcpip.h>
-#else
-#include <net/if.h>
-#include <netdb.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/types.h>
-#include <unistd.h>
-#endif
-
-#include <iostream>
 #include <map>
 #include <string>
-#include <vector>
 
 namespace kiwix
 {