Merge pull request #15466 from karalabe/uint64-gas-limit

accounts/abi/bind/backend.go

accounts/abi/bind/backends/simulated.go

accounts/abi/bind/base.go

accounts/abi/bind/bind_test.go

accounts/abi/bind/util_test.go

accounts/usbwallet/trezor.go

cmd/faucet/faucet.go

cmd/puppeth/genesis.go

cmd/utils/flags.go

consensus/ethash/algorithm_test.go

consensus/ethash/consensus.go

contracts/chequebook/cheque.go

contracts/ens/ens.go

contracts/ens/ens_test.go

core/bench_test.go

core/block_validator.go

core/blockchain.go

core/blockchain_test.go

core/chain_makers.go

core/chain_makers_test.go