- Renamed make_filter() to filter_rule().

- Renamed make_filter() to filter_rule().
- Added the "/" modifier to the -/+ filter rules to allow the
  rule to specify an absolute path (sets MATCHFLG_ABS_PATH).
- Added the passing of the xflgags to filter_rule() and key off
  XFLG_ANCHORED2ABS to prepend the current dirbuf value (was
  keing off MATCHFLG_ABS_PATH).
- We no longer allow a '=' to separate the filter rule from its
  arg (just a single space or an underscore).
- For triple verbose levels, mention when we look for a filter
  file even if we don't find it (used to only mention the file
  when it was found).
- A chrooted daemon process now includes /.cvsignore (inside the
  chrooted hierarchy) instead of $HOME/.cvsignore.