Use bdb 6.1 by default.
Use bdb 6.1 by default.

novacoin-project/novacoin,fsb4000/novacoin,byncoin-project/byncoin,penek/novacoin,byncoin-project/byncoin,fsb4000/novacoin,fsb4000/novacoin,novacoin-project/novacoin,fsb4000/novacoin,byncoin-project/byncoin,byncoin-project/byncoin,penek/novacoin,novacoin-project/novacoin,novacoin-project/novacoin,fsb4000/novacoin,byncoin-project/byncoin,novacoin-project/novacoin,penek/novacoin,byncoin-project/byncoin,penek/novacoin,fsb4000/novacoin,penek/novacoin,penek/novacoin,novacoin-project/novacoin