Make sure that logger options that we extract from config file are put in
correct places when starting erl, directly after -ejabberd, custom
EJABBERD_OPTS should be places after them.
This fixes issue #4109
This makes `user_check` hook work better with authentication methods
that don't have a way to determine if user exists (like is the case for
jwt and cert based authentication), and as result will improve mod_offline
and mod_mam handling of offline messages to those users. This reuses
information stored by `mod_last` for this purpose.
Should fix issue #3377.
Registering a nick in the MUC service or in a room is mutually exclusive:
- A nick that is registered in the service cannot be registered in any
room, not even the original owner can register it.
- Similarly, a nick registered in any room cannot be registered in the