Issue #7523: Add SOCK_CLOEXEC and SOCK_NONBLOCK to the socket module,
where supported by the system.  Patch by Nikita Vetoshkin.
diff --git a/pyconfig.h.in b/pyconfig.h.in
index 545dbe3..99ae85b 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -40,6 +40,9 @@
    the case on Motorola V4 (R40V4.2) */
 #undef GETTIMEOFDAY_NO_TZ
 
+/* Define to 1 if you have the `accept4' function. */
+#undef HAVE_ACCEPT4
+
 /* Define to 1 if you have the `acosh' function. */
 #undef HAVE_ACOSH