REORG: include: move stick_table.h to haproxy/stick_table{,-t}.h

The stktable_types[] array declaration was moved to the main file as
it had nothing to do in the types. A few declarations were reordered
in the types file so that defines were before the structs. Thread-t
was added since there are a few __decl_thread(). The loss of peers.h
revealed that cfgparse-listen needed it.
diff --git a/include/types/proxy.h b/include/types/proxy.h
index 5ba68c7..7579d8a 100644
--- a/include/types/proxy.h
+++ b/include/types/proxy.h
@@ -46,7 +46,7 @@
 #include <types/log.h>
 #include <haproxy/sample-t.h>
 #include <types/server.h>
-#include <types/stick_table.h>
+#include <haproxy/stick_table-t.h>
 
 /* values for proxy->state */
 enum pr_state {