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.
module:hook("authentication-success", function (event)
local session = event.session;
local sasl_handler = session and session.sasl_handler;
local log = session and session.log or module._log
log("info", "Authenticated with %s", sasl_handler and sasl_handler.selected or "legacy auth");
end);