Expand docs for NetDirProvider
Apropos a question that arose on IRC, to which I felt the answer wasn't 100% unambiguous.
Also, reference the usual implementation (it can't be a link because it's an upward reference).
Apropos a question that arose on IRC, to which I felt the answer wasn't 100% unambiguous.
Also, reference the usual implementation (it can't be a link because it's an upward reference).