Fixes this Lua error because the variable didn't have the LIB scope to it.
[ERROR] lua/streamradio_core/cache.lua:388: attempt to index global 'forbidden' (a nil value)
1. onsuccess - lua/streamradio_core/cache.lua:388
2. unknown - lua/includes/modules/http.lua:29
Fixes this Lua error because the variable didn't have the LIB scope to it.