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, 8 insertions, 7 deletions

diff --git a/src/shared/switch-root.c b/src/shared/switch-root.c
index b12189cd10..205a2e1449 100644
--- a/src/shared/switch-root.c
+++ b/src/shared/switch-root.c
@@ -19,20 +19,21 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <sys/stat.h>
-#include <stdbool.h>
 #include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
 #include <string.h>
 #include <sys/mount.h>
+#include <sys/stat.h>
 #include <unistd.h>
-#include <fcntl.h>
 
-#include "util.h"
-#include "path-util.h"
-#include "mkdir.h"
-#include "rm-rf.h"
 #include "base-filesystem.h"
 #include "missing.h"
+#include "mkdir.h"
+#include "path-util.h"
+#include "rm-rf.h"
+#include "string-util.h"
+#include "util.h"
 #include "switch-root.h"
 
 int switch_root(const char *new_root, const char *oldroot, bool detach_oldroot,  unsigned long mountflags) {