proc migration from the Linux PMDA to a new PMDA

[Mark Goodwin <mgoodwin@xxxxxxxxxx>]

For various reasons, 'proc' metrics (per-process) need to be in
their own PMDA. So I'm proposing to remove them from the Linux
PMDA and reincarnate them in a new stand-alone PMDA. That means
their PMIDs will all change (different domain number).

Does anyone maintain logger archives that would require pmid
migration/translation? Or can we just ignore that problem?

Also, what about platforms other than Linux. Would the new
PMDA need to be portable, e.g. for Solaris? Darwin? Windows??
There is probably insufficient overlap in metrics and semantics
that portability would be infeasible, but thought I'd ask anyway.

Thanks
-- Mark