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/proxy.c b/src/proxy.c
index ba8a07d..52f0c9d 100644
--- a/src/proxy.c
+++ b/src/proxy.c
@@ -17,11 +17,16 @@
 #include <sys/socket.h>
 #include <sys/stat.h>
 
-#include <haproxy/applet-t.h>
+#include <import/eb32tree.h>
+#include <import/ebistree.h>
+
 #include <haproxy/api.h>
+#include <haproxy/applet-t.h>
+#include <haproxy/capture-t.h>
 #include <haproxy/cfgparse.h>
 #include <haproxy/cli.h>
 #include <haproxy/errors.h>
+#include <haproxy/fd.h>
 #include <haproxy/filters.h>
 #include <haproxy/global.h>
 #include <haproxy/http_ana.h>
@@ -30,23 +35,16 @@
 #include <haproxy/obj_type-t.h>
 #include <haproxy/peers.h>
 #include <haproxy/pool.h>
+#include <haproxy/proto_tcp.h>
 #include <haproxy/proxy.h>
 #include <haproxy/server-t.h>
+#include <haproxy/signal.h>
 #include <haproxy/stats-t.h>
 #include <haproxy/stream.h>
 #include <haproxy/stream_interface.h>
 #include <haproxy/task.h>
 #include <haproxy/time.h>
 
-#include <import/eb32tree.h>
-#include <import/ebistree.h>
-
-#include <haproxy/capture-t.h>
-
-#include <haproxy/fd.h>
-#include <haproxy/proto_tcp.h>
-#include <haproxy/signal.h>
-
 
 int listeners;	/* # of proxy listeners, set by cfgparse */
 struct proxy *proxies_list  = NULL;	/* list of all existing proxies */