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, 12 insertions, 10 deletions

diff --git a/src/import/pull-tar.c b/src/import/pull-tar.c
index bd35f1b842..fb4d5bf512 100644
--- a/src/import/pull-tar.c
+++ b/src/import/pull-tar.c
@@ -23,22 +23,24 @@
 #include <curl/curl.h>
 
 #include "sd-daemon.h"
-#include "utf8.h"
-#include "strv.h"
-#include "copy.h"
+
 #include "btrfs-util.h"
-#include "util.h"
+#include "copy.h"
+#include "curl-util.h"
+#include "hostname-util.h"
+#include "import-common.h"
+#include "import-util.h"
 #include "macro.h"
 #include "mkdir.h"
-#include "rm-rf.h"
 #include "path-util.h"
 #include "process-util.h"
-#include "hostname-util.h"
-#include "import-util.h"
-#include "import-common.h"
-#include "curl-util.h"
-#include "pull-job.h"
 #include "pull-common.h"
+#include "pull-job.h"
+#include "rm-rf.h"
+#include "string-util.h"
+#include "strv.h"
+#include "utf8.h"
+#include "util.h"
 #include "pull-tar.h"
 
 typedef enum TarProgress {