man pages must be reviewed

[GoogleCodeExporter]

Man pages should be updated, in general.
There are new ones for (some of) the new nix
features, but other ones ignore that this system
differs from Plan 9 in some respects. Most notably,
introduction pages should perhaps change.

It would be good to review all of them to check out that
they are correct for nix. But I know that's a herculean task.

Original issue reported on code.google.com by nemo.m...@gmail.com on 17 Sep 2011 at 5:15