nut: ensure time_t is defined in upsclient.h

Use an upstream commit to ensure time_t is defined in upsclient.h,
fixing a compile failure in collectd.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>

net/nut/patches/001-clients-upsclient.h-ensure-time_t-is-defined.patch

@@ -0,0 +1,27 @@
+From cafd77993ec5e16634b774b65bf6da9b34a21fc5 Mon Sep 17 00:00:00 2001
+From: Jim Klimov <jimklimov+nut@gmail.com>
+Date: Wed, 31 Aug 2022 11:24:19 +0200
+Subject: [PATCH] clients/upsclient.h: ensure time_t is defined
+
+
+--- a/clients/upsclient.h
++++ b/clients/upsclient.h
+@@ -41,6 +41,18 @@
+ 	#include <limits.h>
+ #endif
+ 
++/* Not including NUT timehead.h because this is part of end-user API */
++#ifdef TIME_WITH_SYS_TIME
++# include <sys/time.h>
++# include <time.h>
++#else
++# ifdef HAVE_SYS_TIME_H
++#  include <sys/time.h>
++# else
++#  include <time.h>
++# endif
++#endif
++
+ #ifdef __cplusplus
+ /* *INDENT-OFF* */
+ extern "C" {