Mudlib related efuns

These efuns do things which probably should be done by the mudlib, but
are kept for backwards compatibility.

<DL>
*  author_stats
*  domain_stats
*  export_uid
*  find_living
*  geteuid
*  getuid
*  living
*  livings
*  query_privs
*  set_author
*  set_light
*  set_living_name
*  set_privs
*  seteuid
</DL>

 Tim Hollebeek  Beek@ZorkMUD, Lima Bean, IdeaExchange, and elsewhere
