Tone down warning about GNU Interactive Tools
The mention of 1997 was correct when it was made, and it still is true
to some extent (http://savannah.gnu.org/forum/forum.php?forum_id=5189
says it has not been actively maintained for quite some time). However,
because its name changed not to conflict with us, it is no longer
relevant whether many users use gnuit or have moved away to graphical
file managers.
The only people possibly affected are people who have older version of
gnuit installed as "git".
Signed-off-by: Junio C Hamano <gitster@pobox.com>