col is used to display troff documents in ttys, removing the reverse
line feeds generated by .2C in ms. This implementation keeps the limit
of 256 lines of 800 characteres of the original implementation.
Not quite necessary to have this in sbase at the moment. We can do
a clean implementation when required.
This implementation also has some bugs that they have been fixed
in OpenBSD -current but I am too lazy to backport (we also had local
changes to col(1)).
printf(1) as imported from OpenBSD will stay for now because I need
it for booting my system.