/tmp versus temporary file types

[Anw%maths.nottingham.ac.uk at UCL-CS.ARPA]

> A null path component already has a meaning (same as ".").
	Well, yes, more-or-less;  "the null file name refers to the current
directory" [The UNIX Time-Sharing System], and repeated slashes are ignored,
but (a) is this anything but a kludge so that "/" works? and (b) apart from
"/", has anyone ever used this facility in real-life?

	V7 (but not some other systems) even allows "fred///" as a synonym
for "fred" (an ordinary file);  I can see no reason why this, and "///tmp//"
and so on, should not be errors.