2006/05/17 Max Horn

    A few fixes for OS X.

    1) select()ing on a pcap FD doesn't always work.  Advice from
       tcpdump mailing list archive is to put it into non-blocking
       mode and ignore the select() return value.

    2) Added $(LDFLAGS) to link command line in Makefile to have
       dnstop linked with specific libraries.  LDFLAGS will be
       picked up from the environment.

    3) OS X needs to #include <arpa/nameser_compat.h>

2006/04/24 Duane Wessels
	
    Adriaan Peeters reported that the list of known TLDs is
    out-of-date.  In particular, the .EU domain is not in the list.
	
2005/04/05 Duane Wessels

    Mark Foster found a bug with the source+SLD list.  It was being
    updated for 3RD-level domain names as well.  Mark also suggested
    that the '@' key should display the source+SLD screen, just as
    '3' and '#' work for 3RD-level.

2005/01/21 Sam Norris

    Added support for third-level domain statistics.  Use the -t
    command line option to enable collection of 3rd-level stats,
    and use '3' while running to display them.  Note that enabling
    3rd-level stats collection does not automatically also enable
    2nd-level stats.

2005/01/13 Duane Wessels

    Added a non-interactive mode.  If you specify a savefile and
    stdout is not a TTY, dnstop prints each table at the end.

2004/03/09 Duane Wessels

    Added filter support.  Filters can be used to restrict the input
    stream to queries with certain characteristics.  The currently
    defined filters are:

    unknown-tlds        Only includes queries for TLDs that are
			bogus.  Useful for identifying hosts/servers
			that leak queries for things like "localhost"
			or "workgroup."

    A-for-A             Only includes A queries for names that are
			already IP addresses.  Certain Microsoft
			Windows DNS servers have a known bug that
			forward these queries.

    rfc1918-ptr         PTR queries for addresses in RFC1918 space.
			These should never leak from inside an
			organization.

2003/11/13 Mark Foster <mark@foster.cc>

    Added 'c' to display options. This screen will combine the
    source and sld fields to show "who is querying for what" -
    reason: we see alot of duplicate querys for whatever reason.
    This will help separate the legitimate queries from the broken
    resolvers, etc. See http://www.circleid.com/article/102_0_1_0_C/
    for more about that.
