pcp updates - rate() for derived metrics, sysstat/sar2pcp updates

[Ken McDonell <kenj@xxxxxxxxxxxxxxxx>]

Changes committed to git://git.performancecopilot.org/kenj/pcp.git dev

 man/man3/pmregisterderived.3  |   36 
 qa/370                        |    3 
 qa/370.out.7                  |13424 ++++++++++++++++++++++++++++++++++++++++++
 qa/753                        |   64 
 qa/753.out                    |  105 
 qa/922                        |  153 
 qa/922.out                    |  442 +
 qa/group                      |    2 
 qa/src/sa-sysstat-10.2.0      |binary
 src/libpcp/src/derive.c       |   60 
 src/libpcp/src/derive.h       |   19 
 src/libpcp/src/derive_fetch.c |  140 
 src/pmdas/sample/help         |    6 
 src/sar2pcp/sar2pcp           |   37 
 14 files changed, 14440 insertions(+), 51 deletions(-)

commit 13bb365455032ebeec4b3244189a63e8451cc404
Author: Ken McDonell <kenj@xxxxxxxxxxxxxxxx>
Date:   Tue Aug 5 09:57:51 2014 +1000

    Add rate() function for derived metrics
    
    rate() supports rate conversion as implemented by several PMAPI
    clients, but not restricted to counter metrics.
    
    This commit includes the libpcp changes, man page updates and
    some new QA.

commit 2064929c9e7d6b41bd6c1b0948e44a71497eb370
Author: Ken McDonell <kenj@xxxxxxxxxxxxxxxx>
Date:   Tue Aug 5 09:18:35 2014 +1000

    sample pmda - add a little more help text

commit 842f66c98155b8fb52856afd5f0a2127832bfb48
Author: Ken McDonell <kenj@xxxxxxxxxxxxxxxx>
Date:   Tue Aug 5 07:29:36 2014 +1000

    Move sar2pcp ahead to sysstat 10.2.0
    
    New QA case, and some sar2pcp changes to support the additional
    metrics:
        mem.util.dirty
        filesys.capacity
        filesys.free
        filesys.used
        filesys.maxfiles
        filesys.freefiles
        filesys.usedfiles