[issue1493] games/hack: replace sgtty with termios

[Ulrich Spoerlein (via DragonFly issue tracker)]

New submission from Ulrich Spoerlein <uqs at spoerlein.net>:

These changes are taken from the FreeBSD port and remove the dependency on 
sgtty.

I also removed most of the SYSV7/BSD defines. Some still remain

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files: hack.diff
messages: 7327
nosy: uqs
priority: cleanup
status: unread
title: games/hack: replace sgtty with termios

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