[RFA] New command "info proc" for Linux

[Michael Snyder]

Eli Zaretskii wrote:
> 
> On Tue, 15 Jan 2002, Michael Snyder wrote:
> 
> > Committed.
> 
> Michael, please don't forget the documentation.  Thanks.

Not straightforward.  Couple of issues:

1) The old implementation of the "info proc" command was 
poorly documented -- many of the documented sub-commands
were never implemented.  And the command was only available
on "/proc" systems (real ones, not Linux).

2) The stuff I've just added will ONLY work on Linux, 
not on other ("real") /proc systems.