#2 cards always shown at showdown

[Marot]

It seems like holecards are shown for each player at
showdown. I think it would be better not to show
those hands that are not better than the previously
shown hand. Or at least it should be somehow
configurable.

(I admit that I did not play ircpoker in the old
days, but usually it is not necessary to show your
holecards.)

I'm using pytbot-0.3.9c-NO_DB.

Thanks.