mod_admin_shell: Tighten up type checks to fix #1754 (thanks clouded) Due to the dummy statistics provider (see core.statsmanager line 250) having a metatable that allows infinite indexing where everything is always the same table, which end up in suf() in the concatenation line.

-- Unknown platform stub
module:set_global();

-- TODO Do things that make sense if we don't know about the platform