witness.cpp:  Add a little logging on startup
witness.cpp:  Add a little logging on startup

pmconrad/graphene,pmconrad/graphene,abitmore/bitshares-2,oxarbitrage/bitshares-core,bigoc/openchain,bitsuperlab/cpp-play2,pmconrad/graphene,cryptonomex/graphene,bitshares/bitshares-2,bitshares/bitshares-2,bitsuperlab/cpp-play2,peertracksinc/muse,peertracksinc/muse,bitshares/bitshares-2,bitsuperlab/cpp-play2,abitmore/bitshares-2,bitshares/bitshares-2,oxarbitrage/bitshares-core,pmconrad/graphene,bigoc/openchain,oxarbitrage/bitshares-core,peertracksinc/muse,abitmore/bitshares-2,cryptonomex/graphene,bigoc/openchain,abitmore/bitshares-2,oxarbitrage/bitshares-core,peertracksinc/muse,bigoc/openchain,cryptonomex/graphene