MINOR: lua: add AppletHTTP class and service

This class is used by Lua code for running as an applet called in HTTP mode
It defines also the associated lua service

include/types/applet.h

@@ -120,6 +120,13 @@ struct appctx {
 			int flags;
 			struct task *task;
 		} hlua_apptcp;
+		struct {
+			struct hlua hlua;
+			int left_bytes; /* The max amount of bytes that we can read. */
+			int flags;
+			int status;
+			struct task *task;
+		} hlua_apphttp;
 		struct {
 			struct dns_resolvers *ptr;
 		} resolvers;

include/types/hlua.h

@@ -18,6 +18,7 @@
 #define CLASS_HTTP         "HTTP"
 #define CLASS_MAP          "Map"
 #define CLASS_APPLET_TCP   "AppletTCP"
+#define CLASS_APPLET_HTTP  "AppletHTTP"
 
 struct stream;