Log Message:
Rip out struct sgttyb. And <termio.h>. This is 2014.

Should fix the build on Solaris and most other OSes that don't keep a
museum of historical BSD curiosities on tap.

Also, make the termios code already present actually work instead of
zeroing some things, using uninitialized values for others, and
thereby hanging up the tty. Given that some of the logic apparently
came from Debian patches, I'm not impressed. (I suppose Linux probably
doesn't honor hangup via setting the speed to 0.)

While here also fix up the window size handling.

Input now works properly for me (on NetBSD) and it didn't before I
started mucking around, so it seems like generally a step forward.

PKGREVISION -> 1.