util-lib: split our string related calls from util.[ch] into its own file string-util.[ch]

There are more than enough calls doing string manipulations to deserve
its own files, hence do something about it.

This patch also sorts the #include blocks of all files that needed to be
updated, according to the sorting suggestions from CODING_STYLE. Since
pretty much every file needs our string manipulation functions this
effectively means that most files have sorted #include blocks now.

Also touches a few unrelated include files.

1 files changed, 11 insertions, 10 deletions

diff --git a/src/core/namespace.c b/src/core/namespace.c
index 2b8b707df5..6806fc27e6 100644
--- a/src/core/namespace.c
+++ b/src/core/namespace.c
@@ -20,23 +20,24 @@
 ***/
 
 #include <errno.h>
-#include <sys/mount.h>
-#include <string.h>
+#include <sched.h>
 #include <stdio.h>
-#include <unistd.h>
+#include <string.h>
+#include <sys/mount.h>
 #include <sys/stat.h>
-#include <sched.h>
+#include <unistd.h>
 #include <linux/fs.h>
 
-#include "strv.h"
-#include "util.h"
-#include "path-util.h"
-#include "missing.h"
-#include "loopback-setup.h"
 #include "dev-setup.h"
+#include "loopback-setup.h"
+#include "missing.h"
+#include "mkdir.h"
+#include "path-util.h"
 #include "selinux-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "util.h"
 #include "namespace.h"
-#include "mkdir.h"
 
 typedef enum MountMode {
         /* This is ordered by priority! */