**** cvs_log_diff.pl 0.9 -- compare logs between two cvs revisions ****
                            Goetz Pfeiffer 2006

Syntax:
  cvs_log_diff.pl {options} [file]

  options:
    -h: help
    --summary: give a summary of the script
    -r --revision  [cvs-tag1] (mandatory)
    -s --revision2 [cvs-tag2] (optional)
    -s [2nd cvs revision] (optional)
    -f [file] show logs only for a single file
    -l list only files that changed from tag1 to tag2
    --taglist [no] 
      no positive: list all tags found in at least [no] files
      no negative: list all tags found in at least [fileno+no] files
        e.g -taglist -2 with 100 files: must be found in at least 98 files
    -q : suppress "tag [TAG] not known..." warnings	
    -b --branches: include branches into log-display