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/sink.c b/src/sink.c
index 8128775..a8fd018 100644
--- a/src/sink.c
+++ b/src/sink.c
@@ -25,11 +25,11 @@
 #include <haproxy/errors.h>
 #include <haproxy/list.h>
 #include <haproxy/log.h>
-#include <haproxy/time.h>
 #include <haproxy/ring.h>
 #include <haproxy/signal.h>
 #include <haproxy/sink.h>
 #include <haproxy/stream_interface.h>
+#include <haproxy/time.h>
 
 struct list sink_list = LIST_HEAD_INIT(sink_list);