patch 8.0.0959: build failure on MS-Windows

Problem:    Build failure on MS-Windows.
Solution:   Use ioctlsocket() instead of fcntl().

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    959,
 /**/
     958,
 /**/