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/ev_epoll.c b/src/ev_epoll.c
index 8096988..2501dd5 100644
--- a/src/ev_epoll.c
+++ b/src/ev_epoll.c
@@ -14,15 +14,14 @@
 #include <sys/time.h>
 #include <sys/types.h>
 
+#include <haproxy/activity.h>
 #include <haproxy/api.h>
+#include <haproxy/fd.h>
 #include <haproxy/global.h>
 #include <haproxy/signal.h>
-#include <haproxy/tools.h>
 #include <haproxy/ticks.h>
 #include <haproxy/time.h>
-
-#include <haproxy/activity.h>
-#include <haproxy/fd.h>
+#include <haproxy/tools.h>
 
 
 /* private data */