qa/943 - dodge error from proc.psinfo.cgroups

On some platforms we're seeing
    proc.psinfo.cgroups -61 No data available
just pretend this is OK.
qa/qa_hosts.master - tweak kenj's entries
Merge branch 'dev' of git://git.performancecopilot.org/kenj/pcp into dev
qa/734 - fix for longer hostnames

Truncate the hostname in the QA test to match what a correctly
behaving pmstat would report.
qa/752 - fix problems with timezones and certain times of day

This test has been notoriously flakey.  Rework the filtering to
try and improve stability.
libpcp/AF.c - fix lock initialization race

Sometimes seen in qa/134 (and others), a pmlogger -c /dev/null -L would
hang and not allow pmlc to connect.

Tracked down to a nested __pmInitLocks() call because the timer alarm
went off in the middle of setting up.  This fix forces __pmInitLocks()
to be called early on when the __pmAF* routines are called.
qa/752 - reorder filter lines to dodge ambiguity

"next tuesday" could also be tomorrow ... do the former first
qa/check - add one more \n when a failure occurs before the diff output
qa/823 - lots more diagnostics to help debug this one
qa/README - add notes about firewalls
iostat2pcp: cater for changes to iostat output formats

Add support for iostat2pcp handling of two new columns in
the device format, and new interval format specification:
http://www.pcp.io/pipermail/pcp/2014-October/005777.html

Initial testing extends the qa/373 case, will follow this
up with a new test shortly that uses the installed version
of iostat for conversion checking (ala qa/370 for sar).
packaging: update debian suggests vs recommends usage

Marko reports the use of Recommends: is causing apt-get on
Ubuntu at least to also install those (even though its not
a Depends: line) - which result in large unintended package
installations in the case of pcp-gui at least.
Merge branch 'dev' of git://git.pcp.io/kenj/pcp into dev