wallet: update addnode
wallet: update addnode

Nobody asked for it but I did it anyway.
Don't know if this will have implication on Testnet if the added nodes don't run Testnet.
Added new nodes and removed dead ones where the hostname resolution failed according to https://addnode.cycy.me
gridcoin/Gridcoin-Research,gridcoin/Gridcoin-Research,gridcoin/Gridcoin-Research,caraka/gridcoinresearch,caraka/gridcoinresearch,gridcoin/Gridcoin-Research,caraka/gridcoinresearch,caraka/gridcoinresearch,caraka/gridcoinresearch,gridcoin/Gridcoin-Research,caraka/gridcoinresearch,gridcoin/Gridcoin-Research