RFC: path display and path filtering features.

[Roland McGrath]

> We could canonicalize absolute pathname arguments.
> We even could canonicalize relative pathname arguments using
> /proc/$pid/cwd.
> But I'm not sure now whether we really need this or not.

Given per-process mount namespace, this could be error prone.
At least, it takes extra care to consider /proc/$pid/root too.
So I'd avoid that complexity to start with.


Thanks,
Roland