daemon/bindings: metatable wasn’t called on cache.{storage|size}

the bindings wrote the keys on completion, so they existed
and __newindex was never called - now current {storage|size}
are saved as cache.current_{storage|size}

daemon/bindings.c

@@ -382,10 +382,10 @@ static int cache_open(lua_State *L)
 
 	/* Store current configuration */
 	lua_getglobal(L, "cache");
-	lua_pushstring(L, "size");
+	lua_pushstring(L, "current_size");
 	lua_pushnumber(L, cache_size);
 	lua_rawset(L, -3);
-	lua_pushstring(L, "storage");
+	lua_pushstring(L, "current_storage");
 	lua_pushstring(L, uri);
 	lua_rawset(L, -3);
 

daemon/lua/sandbox.lua

@@ -52,8 +52,8 @@ setmetatable(modules, {
 -- `cache.{size|storage} = value`
 setmetatable(cache, {
 	__newindex = function (t,k,v)
-		if     k == 'size'    then t.open(v, rawget(t, 'storage'))
-		elseif k == 'storage' then t.open(rawget(t, 'size'), v)
+		if     k == 'size'    then t.open(v, rawget(t, 'current_storage'))
+		elseif k == 'storage' then t.open(rawget(t, 'current_size'), v)
 		else   rawset(t, k, v) end
 	end
 })