Release oksh-7.2

Release oksh-7.1

Release oksh-7.0

Release oksh-6.9

This is oksh-6.8.1

Allow this code to be commented out when not compiling with curses.

I was asked to release a new tarball because of the cross

compiling support. So let's just make a new tarball, 6.7.1, that
matches 6.8-beta as of today.

It is very likely more changes will be coming before 6.8 is
released. So if you're looking for that, this ain't it.