[textproc/clit] changed category (was "converters") and reworded description
[textproc/clit] changes per ports@ mailing list feedback[1]

This revision also includes workaround for a bug presumely caused by recent
binutils update. Hopefully, things will become straight-forward again soon.

[1] http://article.gmane.org/gmane.os.openbsd.ports/60757