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/src/acl.c b/src/acl.c
index caa9dd1..c0b6985 100644
--- a/src/acl.c
+++ b/src/acl.c
@@ -29,7 +29,7 @@
 #include <proto/log.h>
 #include <proto/proxy.h>
 #include <haproxy/sample.h>
-#include <proto/stick_table.h>
+#include <haproxy/stick_table.h>
 
 #include <import/ebsttree.h>