Add checkpoint for testnet.
Add checkpoint for testnet.

bitcoinclassic/bitcoinclassic,bitcoinclassic/bitcoinclassic,zander/bitcoinclassic,bitcoinclassic/bitcoinclassic,zander/bitcoinclassic,zander/bitcoinclassic,zander/bitcoinclassic,bitcoinclassic/bitcoinclassic,zander/bitcoinclassic,zander/bitcoinclassic,bitcoinclassic/bitcoinclassic,bitcoinclassic/bitcoinclassic