Can we update Lua?

[lleachii]

@vlan1

Is there a reason why the version of Lua is so terribly old?

Likely because it's no longer used generally.

@jow

Those remaining bits were still implemented using the Lua 5.1 language and have now been rewritten using the ucode language used by firewall4 introduced with the 22.03 release.

The Lua parts required to retain compatibility with older LuCI apps or apps that already do client side rendering but still rely on Lua code in the backend (e.g. for custom controllers or rpcd exec plugins) were factored out into a new luci-lua-runtime package.