CLEANUP: include: tree-wide alphabetical sort of include files

This patch fixes all the leftovers from the include cleanup campaign. There
were not that many (~400 entries in ~150 files) but it was definitely worth
doing it as it revealed a few duplicates.
diff --git a/src/arg.c b/src/arg.c
index a0f9a59..2676ce8 100644
--- a/src/arg.c
+++ b/src/arg.c
@@ -14,10 +14,10 @@
 #include <sys/socket.h>
 #include <arpa/inet.h>
 
-#include <haproxy/tools.h>
+#include <haproxy/arg.h>
 #include <haproxy/chunk.h>
 #include <haproxy/global.h>
-#include <haproxy/arg.h>
+#include <haproxy/tools.h>
 
 const char *arg_type_names[ARGT_NBTYPES] = {
 	[ARGT_STOP] = "end of arguments",