Ticket 47520 - Fix various issues with logconv.pl
    
    Bug Description:  When testing an access log that contains "internal" connections/ops, many
                      warning messages are created.  Other warnings are generated because the
                      DB_File arrays need to have thier elements checked before comparing to other
                      strings.
    
    Fix Description:  Improve value checking.  Add support for connection numbers that are words (Internal),
                      and negative values for op ids(-1).
    
    https://fedorahosted.org/389/ticket/47520
    
    Reviewed by: richm(Thanks!)