Clarify the documentation regarding the recent change to the behavior of CCN_FORW_LAST.
Clarify the documentation regarding the recent change to the behavior of CCN_FORW_LAST.

cawka/ndnx,svartika/ccnx,ebollens/ccnmp,ebollens/ccnmp,svartika/ccnx,cawka/ndnx,cawka/ndnx,cawka/ndnx,svartika/ccnx,svartika/ccnx,svartika/ccnx,ebollens/ccnmp,svartika/ccnx,cawka/ndnx,ebollens/ccnmp,svartika/ccnx