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

A few includes had to be added, namely list-t.h in the type file and
types/proxy.h in the proto file. actions.h was including http-htx.h
but didn't need it so it was dropped.
diff --git a/src/hlua.c b/src/hlua.c
index 3de0bea..daf2a8f 100644
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -25,6 +25,7 @@
 #include <import/ebpttree.h>
 
 #include <common/cfgparse.h>
+#include <haproxy/http_htx.h>
 #include <haproxy/thread.h>
 #include <haproxy/regex.h>
 #include <haproxy/xref.h>
@@ -45,7 +46,6 @@
 #include <proto/hlua.h>
 #include <proto/hlua_fcn.h>
 #include <proto/http_fetch.h>
-#include <proto/http_htx.h>
 #include <proto/http_rules.h>
 #include <proto/map.h>
 #include <proto/obj_type.h>