Sort includes in *.c files

Not enabling in .clang-format because it breaks headers files.

Used:
    IncludeCategories:
      - Regex:           '^<config'
        Priority:        0
      - Regex:           '^".*"'
        Priority:        1
      - Regex:           '^<(xcb|xkb|yajl|X11)'
        Priority:        3
      - Regex:           '.*'
        Priority:        2

libi3/dpi.c

@@ -9,6 +9,7 @@
 
 #include <math.h>
 #include <stdlib.h>
+
 #include <xcb/xcb_xrm.h>
 
 static long dpi;

libi3/draw_util.c

@@ -8,12 +8,13 @@
  */
 #include "libi3.h"
 
-#include <stdlib.h>
+#include <cairo/cairo-xcb.h>
 #include <err.h>
+#include <stdlib.h>
 #include <string.h>
+
 #include <xcb/xcb.h>
 #include <xcb/xcb_aux.h>
-#include <cairo/cairo-xcb.h>
 
 /* The default visual_type to use if none is specified when creating the surface. Must be defined globally. */
 extern xcb_visualtype_t *visual_type;

libi3/fake_configure_notify.c

@@ -7,8 +7,8 @@
  */
 #include "libi3.h"
 
-#include <stdlib.h>
 #include <stdbool.h>
+#include <stdlib.h>
 
 #include <xcb/xcb.h>
 #include <xcb/xproto.h>

libi3/font.c

@@ -8,14 +8,13 @@
 #include "libi3.h"
 
 #include <assert.h>
+#include <cairo/cairo-xcb.h>
+#include <err.h>
+#include <pango/pangocairo.h>
+#include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
-#include <stdbool.h>
-#include <err.h>
-
-#include <cairo/cairo-xcb.h>
-#include <pango/pangocairo.h>
 
 static const i3Font *savedFont = NULL;
 

libi3/format_placeholders.c

@@ -7,8 +7,8 @@
  */
 #include "libi3.h"
 
-#include <stdlib.h>
 #include <stdint.h>
+#include <stdlib.h>
 #include <string.h>
 
 #ifndef CS_STARTS_WITH

libi3/g_utf8_make_valid.c

@@ -19,8 +19,8 @@
 
 #include "libi3.h"
 
-#include <string.h>
 #include <glib.h>
+#include <string.h>
 
 /* Copied from:
  * https://gitlab.gnome.org/GNOME/glib/blob/f928dfdf57bf92c883b53b16d7a9d49add504f52/glib/gutf8.c#L1752-1815 */

libi3/get_colorpixel.c

@@ -6,12 +6,11 @@
  *
  */
 #include "libi3.h"
-
-#include <stdlib.h>
-#include <stdint.h>
-#include <string.h>
-
 #include "queue.h"
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
 struct Colorpixel {
     char hex[8];
     uint32_t pixel;

libi3/get_exe_path.c

@@ -7,12 +7,12 @@
  */
 #include "libi3.h"
 
-#include <unistd.h>
-#include <string.h>
-#include <stdio.h>
-#include <limits.h>
-#include <stdlib.h>
 #include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 
 /*
  * This function returns the absolute path to the executable it is running in.

libi3/get_mod_mask.c

@@ -9,6 +9,7 @@
 
 #include <stdint.h>
 #include <stdlib.h>
+
 #include <xcb/xcb.h>
 #include <xcb/xcb_keysyms.h>
 

libi3/get_process_filename.c

@@ -8,16 +8,15 @@
 #include "libi3.h"
 
 #include <assert.h>
+#include <err.h>
+#include <pwd.h>
+#include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
-#include <stdbool.h>
-#include <err.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <pwd.h>
 #include <unistd.h>
-#include <err.h>
 
 /*
  * Returns the name of a temporary file with the specified prefix.

libi3/ipc_connect.c

@@ -7,14 +7,14 @@
  */
 #include "libi3.h"
 
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <string.h>
 #include <err.h>
-#include <stdlib.h>
-#include <unistd.h>
 #include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/un.h>
+#include <unistd.h>
 
 /*
  * Connects to the i3 IPC socket and returns the file descriptor for the

libi3/ipc_recv_message.c

@@ -7,15 +7,14 @@
  */
 #include "libi3.h"
 
-#include <string.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <unistd.h>
 #include <errno.h>
-#include <inttypes.h>
-
 #include <i3/ipc.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 
 /*
  * Reads a message from the given socket file descriptor and stores its length

libi3/ipc_send_message.c

@@ -7,14 +7,13 @@
  */
 #include "libi3.h"
 
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdint.h>
 #include <err.h>
 #include <errno.h>
-
 #include <i3/ipc.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 
 /*
  * Formats a message (payload) of the given size and type and sends it to i3 via

libi3/is_debug_build.c

@@ -7,8 +7,8 @@
  */
 #include "libi3.h"
 
-#include <string.h>
 #include <stdbool.h>
+#include <string.h>
 
 /*
  * Returns true if this version of i3 is a debug build (anything which is not a

libi3/root_atom_contents.c

@@ -7,12 +7,12 @@
  */
 #include "libi3.h"
 
-#include <stdio.h>
-#include <string.h>
-#include <stdbool.h>
 #include <limits.h>
-#include <stdlib.h>
 #include <math.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
 #include <xcb/xcb.h>
 #include <xcb/xcb_aux.h>

libi3/safewrappers.c

@@ -7,13 +7,13 @@
  */
 #include "libi3.h"
 
-#include <string.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <unistd.h>
-#include <stdio.h>
 #include <err.h>
 #include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 
 /*
  * The s* functions (safe) are wrappers around malloc, strdup, …, which exits if one of

libi3/string.c

@@ -11,11 +11,10 @@
  */
 #include "libi3.h"
 
+#include <glib.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include <glib.h>
-
 struct _i3String {
     char *utf8;
     xcb_char2b_t *ucs2;

libi3/strndup.c

@@ -7,8 +7,8 @@
  */
 #include "libi3.h"
 
-#include <sys/types.h>
 #include <string.h>
+#include <sys/types.h>
 
 #ifndef HAVE_strndup
 /*