Fix stupid error in bind -- pass the flag param

union binds now work just fine.
To test
bind '#I' /net
bind -a '#l' /net
ls /9/net

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Add the srv device
needed for, among other things, cat /proc/1/ns
(i.e. dump your namespace)

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