update-ifupdown-scripts-zg2.d-symlinks(1) on Linux

The text ca20f6e11f1f, as Debian 6.0 (Squeeze) shipped it.

preliminary manpage dump-ifupdown-scripts-zg2.d-symlinks kill-ifupdown-scripts-zg2.d-symlinks check-ifupdown-scripts-zg2.d-symlinks