Don't include headers on windows that aren't available

This mainly concerns mingw build.

src/openssl_stream.c

@@ -12,9 +12,6 @@
 #include <openssl/x509v3.h>
 
 #include <ctype.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
 
 #include "global.h"
 #include "posix.h"
@@ -23,6 +20,12 @@
 #include "netops.h"
 #include "git2/transport.h"
 
+#ifndef GIT_WIN32
+# include <sys/types.h>
+# include <sys/socket.h>
+# include <netinet/in.h>
+#endif
+
 static int ssl_set_error(SSL *ssl, int error)
 {
 	int err;