qa/958 - xv error message depends on locale

Yep, first time for this!! Need to map recognised -> recognized.
Expect this will break for any non-English locale!
pmdagfs2: Add a set of glock latency metrics values

Add a new set of latency metrics for glock grant, demote and queue requests.
These latency metrics are split to include a value for each lock type for
each CPU; Values are calculated through the GFS2 tracepoints and are
measured in micro-seconds (usecs) for each individual lock type.

Updated the qa tests 654 and 655 to both test and reflect these new metrics.

Have also performed some small cleanups:
    - Remove worst_glock.h ARRAY SIZE DEFINE (Missed in re-factorisation)
    - Static function worst_glock_assign_glocks in worst_glock.c
    - Fix comment in worst_glock.c worst_glock_set_state
tarball packaging - postinstall changes

Some more directories and files that need their mode and ownership
to be fixed after unpacking the tarball.

Driven by FreeBSD QA.
QA - FreeBSD changes

With these changes I've almost got -g sanity passing ...
qa/574 - another freebsd tweak
qa/admin/pcp-daily - generalize the handling of non-default git repos
freebsd pmda - put sysctl diag behind debug guard

and don't need filter in qa/232 for bogus diagnostic.
Support for nanosecond resolution event timestamps

Adds support for a new metric type PM_TYPE_HIGHRES_EVENT,
with nanosecond precision (the garden-variety EVENT type
metric supports microsecond resolution).

This touches libpcp, libpcp_pmda, man pages, QA, a number
of client tools (couple still to come) and some new metrics
are added in to pmdasample to exercise end-to-end use.

This is the core functionality and is running well with no
regressions and initial testing.  Some further QA is in the
works still though, checking yet more things (some on-disk
endian checking, deeper/internal API checking, etc) - will
arrive in a separate commit.
Merge branch 'dev' of git://git.performancecopilot.org/kenj/pcp into dev
Merge branch 'dev' of git://github.com/pauljevans/pcp into dev