r18583: a nasty hack to allow me to monitor the number of open file
descriptors in smbd on all build farm machines. I suspect we have a fd
leak somewhere, but its hard to track down.
I know part of the problem is the number of (fake) network interfaces
we define in the build farm tests, with each of them listening on a
whole bunch of different protocol ports. That chews up around 48 file
descriptors just to startup. I don't think thats the real problem
though, and I suspect something else is leaking file descriptors on
some hosts.