util: split out sorting related calls to new sort-util.[ch]

src/journal/catalog.c

@@ -21,6 +21,7 @@
 #include "mkdir.h"
 #include "path-util.h"
 #include "siphash24.h"
+#include "sort-util.h"
 #include "sparse-endian.h"
 #include "strbuf.h"
 #include "string-util.h"

src/journal/journal-file.c

@@ -27,6 +27,7 @@
 #include "path-util.h"
 #include "random-util.h"
 #include "set.h"
+#include "sort-util.h"
 #include "stat-util.h"
 #include "string-util.h"
 #include "strv.h"

src/journal/journal-vacuum.c

@@ -14,9 +14,9 @@
 #include "journal-file.h"
 #include "journal-vacuum.h"
 #include "parse-util.h"
+#include "sort-util.h"
 #include "string-util.h"
 #include "time-util.h"
-#include "util.h"
 #include "xattr-util.h"
 
 struct vacuum_info {