chmod man page "t" attribute.

[Peter Hutnick]

Hello,

I don't know if the man pages are being maintained any more.  The chmod man page
seems to be more informative than the info page . . .

Anyway, if they are, I have the following complaint.

The chmod man page does not indicate the affect of the "t"/leading 1/stick bit
attribute on directories.  I'm told that this prevents unprivileged users from
deleting files that they /do/ have write access to.  I haven't tested this, but
I imagine that it is common knowledge.  (But not to me, since it isn't in the
man page . . . hence the bug report :-)

Also, the existing description of this attribute is not at all clear to me.
While I understand that man pages can't be written to the lowest common
denominator, I think it could be clearer.

Thanks for all of your work!

-Peter