bug#62462: 30.0.50; Implement list-system-processes on Cygwin

[Ken Brown]

I've just discovered, because of the failure of all the proced tests,
that list-system-processes has never been implemented on Cygwin (i.e.,
it always returns nil).  All that's needed to fix this is to tell Emacs
that Cygwin has a /proc filesystem.

Patch attached, with a place holder for the bug number.  With this patch
applied, all of the proced tests pass.  OK to push to master?

Ken

0001-Implement-list-system-processes-on-Cygwin.patch
Description: Text document