PR1073 - pmlogger PID lifetime-matched logging

[Lukas Berk <lberk@xxxxxxxxxx>]

Hi,

Please see commit 7347927a67849a74b67d8b25fb58c033ee79042d on
git://sourceware.org/git/pcpfans.git lberk/dev

Included is a proposed solution for PR1073, monitoring and matching
the lifetime of a pmlogger instance to a PID specified.  I've also
included qa and have found no regressions when testing the pmlogger qa
group.  Any comments appreciated.

Thanks,

Lukas

commit 7347927a67849a74b67d8b25fb58c033ee79042d
Author: Lukas Berk <lberk@xxxxxxxxxx>
Date:   Thu Feb 26 14:13:21 2015 -0500

    PR1073 - pmlogger --PID lifetime tracking functionality
    
    PR1073 detailed a request to run an instance of pmlogger, which
    matched the lifetime of a specified PID.  Monitor return of a kill(PID, 0)
    style call, and exit once we get an ESRCH (no such process) error.
    
    Updated doc pmlogger (1), and additional qa (947) added to the pmlogger
    testing group