mod_compat_roles: Fix attempt to index a nil value #1847
permissions[] is not a map with role names as keys since 817bc9873fc2
but instead a level with host names were added. This was likely an
oversight.
Refactored towards railroad.
-- Changes the process name to 'prosody' rather than 'lua'/'lua5.1'
-- Copyright (C) 2015 Rob Hoelz
--
-- This file is MIT/X11 licensed.
-- To use this module, you'll need the proctitle Lua library:
-- https://github.com/hoelzro/lua-proctitle
local proctitle = require 'proctitle';
proctitle 'prosody';