* Changed some of the rev-level sensitive stuff to look at the actual version

* Changed some of the rev-level sensitive stuff to look at the actual version
  of Citadel running, not the last version with which we ran setup
* Added a moderation system.  Default filter level for new users is in the
  config file.  Per-user setting is in usersupp.  Moderation level of each
  message is in SuppMsgInfo.  Tweaked CONF, GETU, and SETU.  Read filter is
  working.  Moderate message up/down commands are not here yet.  See
  techdoc/moderation.txt for more info.