Get proc working.

The issue is that in plan 9 the proc table is an array, and in
akaros it's a hash. We should change dev/proc.c to always use
the hash but this will require redoing how the proc QID works
and there are bigger fish to fry.

Next step is to get '#p/1/ns' to work. Then we can see our
name spaces.

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Use strtoul now that it's available; removing warning.

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Leave debugging OFF by default now; things are mostly reliable.

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Fix the 'ns' proc file

Now if you do this:
bind -a '#I' /net
bind -a '#l' /net

and then
/ $ cat '#p/1/ns'
bind  /net /net
bind -a #I /net
bind -a #l /net
cd /

I.e. the ns file will show for a given process what its namespace
is. Two nice things here:
- it's nice to see your namespace
- we have a working bit of plan 9 proc

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>