wrap thread join() with try to suppress possible failure.
wrap thread join() with try to suppress possible failure.

GroestlCoin/libgroestlcoin,swansontec/libbitcoin,swansontec/libbitcoin,GroestlCoin/libgroestlcoin,GroestlCoin/libgroestlcoin,swansontec/libbitcoin,swansontec/libbitcoin,GroestlCoin/libgroestlcoin