Refs #100795 Improve CCNDCacheManager.clearCache() correctness

Cancel outstanding interest on return.
Use only explicit interest expression rather than also returning new interest from content handler.
Count number of items marked stale and log (FINER) on return.
Use lack of progress in marking items stale during the wait to signal early completion.
Make all log calls use FAC_NETMANAGER.
Refs #100795 Remove race between wait/notify in watcher and content handler.

The pattern (in a watcher) of
  while(...)
    expressInterest(...)
    synchronized(...) {
	wait(..., delay)
   }
  }
along with a notify() in the content handler doesn't work.

If the content handler does the notify() before the watcher is waiting
then the watcher will not wake early from the wait and the loop will
execute slowly (one interest per loop).
refs #100647 Update README.darwin details on how to build a universal
binary target.
refs #100795 Merge remote-tracking branch 'origin/100795-ccnd-cache-manager'

* origin/100795-ccnd-cache-manager:
  Refs #100795 Remove race between wait/notify in watcher and content handler.
  Refs #100795 Improve CCNDCacheManager.clearCache() correctness
refs #100647 Merge remote-tracking branch 'origin/100647-default-support-for-multiple-archs-in-osx'

* origin/100647-default-support-for-multiple-archs-in-osx:
  refs #100647 Update README.darwin details on how to build a universal binary target.
refs #100647 Clean up extra ws.
refs #100757 Merge remote-tracking branch 'origin/master' into 100757-prep-for-ccnx-061-release

* origin/master: (137 commits)
  refs #100647 Clean up extra ws.
  refs #100647 Update README.darwin details on how to build a universal binary target.
  Refs #100795 Remove race between wait/notify in watcher and content handler.
  refs #100784 Cleanup line/spacing
  Add BroadcastReceiver to handle CONNECTIVITY_UPDATE
  Refs #100795 Improve CCNDCacheManager.clearCache() correctness
  Refs #100321  Bump CCN_API_VERSION to 6003
  Refs #100321  Use : instead of .. to denote range when logging [Min,Max]SuffixComponents
  Refs #100321  Use i=... instead of ie=... in logs. Remove unused flag.
  Refs #100321  Restore the extra delay before sending to a DC face.
  Refs #100321  In the default strategy, preserve more of the ordering.
  Refs #100321  Add strategy callouts when a pit entry is satisfied or times out.
  Refs #100793  Document the new ccnc options.
  refs #100791  Two more options for ccnc: -x for setting content lifetime, and -r for automatic respnders.
  Refs #100791  Add several options to ccnc that will make it more useful in various contexts.
  refs #100792 need to call populateCache2 to initialize in testSameCache
  Refs #100321  When unsure where to start, use first from order out of fib lookup
  Refs #100321  Clamp the predicted response to a smaller value
  Refs #100321  Modify the strategy
  Refs #100321  Make some noise in an exceptional case.
  ...
refs #100757 Bump version details in NEWS.  Add more details on
Contribution to README.
refs #100757 Bump version to 0.6.1RC1
refs #100757 bump version to 0.6.1 in manpage rebuild.
refs #100757 Merge remote branch 'origin/100757-prep-for-ccnx-061-release'

* origin/100757-prep-for-ccnx-061-release:
  refs #100757 bump version to 0.6.1 in manpage rebuild.
  refs #100757 Bump version to 0.6.1RC1
  refs #100757 Bump version details in NEWS.  Add more details on