This changes vi to use resizeterm(3) instead of reinitializing curses on

This changes vi to use resizeterm(3) instead of reinitializing curses on
window resizes, which was leaking massive amounts of memory.

Try observing vi in top(1) and while resizing the window a few times
before and aftering applying this diff..

Also some more comment cleanup and another memory leak..

From github.com/lichray/nvi2
879d2ad6dd4a4343eb0a588ebfe637e1c9845bc4
a8c38480adb030a05bbb2aafec6067dd65d8c2eb

ok millert@