server: Use kernel support for thread affinity when available.
diff --git a/configure b/configure
index ceb6e20..d05447a 100755
--- a/configure
+++ b/configure
@@ -12127,6 +12127,7 @@
 	pwrite \
 	readdir \
 	readlink \
+	sched_setaffinity \
 	sched_yield \
 	select \
 	setproctitle \