util: split out sorting related calls to new sort-util.[ch]
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index 801e79b..ad73600 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -53,6 +53,7 @@
#include "rm-rf.h"
#include "selinux-util.h"
#include "set.h"
+#include "sort-util.h"
#include "specifier.h"
#include "stat-util.h"
#include "stdio-util.h"
@@ -61,7 +62,6 @@
#include "strv.h"
#include "umask-util.h"
#include "user-util.h"
-#include "util.h"
/* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates
* them in the file system. This is intended to be used to create