[PATCH] v9fs: update documentation and fix debug flag

Minor updates to the documentation to bring them into sync with current
websites and available features.  The debug flag was switched back to hex
to match the documentation.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>