Look for features

Source/CTest/Curl/config.h.in

@@ -120,6 +120,9 @@
 /* Define if you want to enable IPv6 support */
 #cmakedefine ENABLE_IPV6                ${ENABLE_IPV6}
 
+/* Define to 1 if you have the <features.h> header file. */
+#cmakedefine HAVE_FEATURES_H ${HAVE_FEATURES_H}
+
 /* Define to 1 if you have the <alloca.h> header file. */
 #cmakedefine HAVE_ALLOCA_H              ${HAVE_ALLOCA_H}