refs #100791 Merge remote-tracking branch 'origin/100791-ccnc-fixes'
refs #100791 Merge remote-tracking branch 'origin/100791-ccnc-fixes'

* origin/100791-ccnc-fixes:
  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 #100791  Actually, we don't need to do the select in all cases - no point if there are no outstanding interests.
  Refs #100791  Reorganize ccnc input handling

svartika/ccnx,cawka/ndnx,svartika/ccnx,svartika/ccnx,svartika/ccnx,svartika/ccnx,cawka/ndnx,cawka/ndnx,svartika/ccnx,cawka/ndnx,svartika/ccnx,cawka/ndnx