Merge go-ethereum updates into 2.5.4

Includes following upstream changes:

(#15131) trie: make fullnode children hash calculation concurrently
(#15198) p2p/simulations: various stability fixes
(#15200) p2p, p2p/discover, p2p/discv5: implement UDP port sharing
(#15207) p2p/simulations: add mocker functionality
(#15238) swarm/api: url scheme bzz-hash to get hashes of swarm content
(#15238) swarm/api: url scheme bzz-hash to get hashes of swarm content
(#15238) swarm/api: url scheme bzz-hash to get hashes of swarm content
(#15285) accounts/abi: include fixed array size in offset for dynamic type
(#15337) eth/downloader: update tests for reliability
(#15438) cmd/ethkey: new command line tool for keys
(#15466) all: switch gas limits from big.Int to uint64
(#15476) eth: return rlp-decoded values from debug_storageRangeAt
(#15497) accounts, consensus, core, eth: make chain maker consensus agnostic
(#15516) cmd, core, eth/tracers: support fancier js tracing
(#15517) cmd/geth: fix geth attach --datadir=...
(#15528) cmd/utils, eth: init etherbase from within eth
(#15545) eth/downloader: dereference discarded statesync request
(#15548) cmd/swarm: add config file
(#15551) common: improve IsHexAddress and add tests
(#15557) cmd/utils: bootstrap nodes in config file were not respected
(#15558) mobile: Add GetSign to BigInt
(#15563) core/vm: track 63/64 call gas off stack
(#15565) build: improve ci.go synopsis
(#15566) buld: enable goconst linter
(#15577) common: fix hex utils to handle 1 byte address conversions
(#15578) whisper/whisperv6: remove aesnonce
(#15579) whisper: rename EnvNonce to Nonce in the v6 Envelope
(#15585) p2p/enr: initial implementation
(#15589) eth: make tracing API errors more user friendly
(#15591) crypto/bn256: fix generator on G1
(#15593) build: enable gosimple linter
(#15597) cmd/geth: add support for geth attach --testnet
(#15603) p2p, swarm/network/kademlia: use IsZero to check for zero time
(#15614) console: add admin.clearHistory command
(#15615) crypto: add DecompressPubkey, VerifySignature
(#15618) accounts/abi: update array length after parsing array
(#15619) core/types: fix typo in comment
(#15620) travis.yml: avoid submodules on builders without tests
(#15621) whisper/whisperv6: remove Version from the envelope
(#15625) rlp: fix string size check in readKind
(#15626) crypto, crypto/secp256k1: add CompressPubkey
(#15629) consensus/ethash: relax requirements when determining future-blocks
(#15631) whisper: sym encryption message padding includes salt
(#15632) crypto: fix error check in toECDSA
(#15640) internal/ethapi: support "input" in transaction args
(#15650) all: use gometalinter.v2, fix new gosimple issues
(#15652) rpc: use method constants instead of literal strings
(#15659) internal/ethapi: fix typo in comment
(#15661) p2p/simulations: fix gosimple nit
(#15666) whisper/whisperv6: message bundling
(#15667) swarm: bzz-list, bzz-raw and bzz-immutable schemes
(#15670) accounts/abi: remove check for len%32==0 when unpacking events
(#15674) core/vm: Remove snapshot param from Interpreter.Run()
(#15679) crypto: Fix comment typo
(#15684) cmd/utils: add check on fd hard limit, skip test if below target
(#15686) cmd/geth: add support for geth --rinkeby attach
(#15692) les: fix les/1 CHT compatibility issue
(#15693) contracts/release: do not print error log if les backend has no peers
(#15696) p2p/discover: fix leaked goroutine in data expiration
(#15698) Improved error message
(#15700) console: create datadir at startup
(#15701) whisper/whisperv6: PoW requirement
(#15708) crypto: ensure that VerifySignature rejects malleable signatures
(#15713) dashboard: integrate Flow, sketch message API
(#15714) core: fix panic when stat-ing a tx from a queue-only account
(#15720) core: fix typos
(#15725) core: silence txpool reorg warning (annoying on import)
(#15726) appveyor: bump Go to 1.9.2
(#15727) params: add Rinkeby bootnode from Akasha
(#15729) cmd/faucet: fix removal of Twitter zlib compression
(#15730) cmd/puppeth: fix faucet 502 error due to non-exposed HTTP port
(#15731) accounts/abi refactor
(#15732) eth, les, light: expose chain config in les node info too
(#15735) console: remove comment about 'invalid' input
(#15737) p2p/discv5: fix reg lookup, polish code, use logger
(#15745) crypto: ensure private keys are < N
(#15747) core, p2p/discv5: use time.NewTicker instead of time.Tick
(#15759) rpc: allow OPTIONS requests without Content-Type
(#15766) accounts/abi: handle named ouputs prefixed with underscores
(#15781) build: fix version comparison for go1.10 and beyond
(#15782) cmd/geth: remove trailing newline in license command
(#15783) whisper/whisper2: fix Go 1.10 vet issues on type mismatches
(#15784) build: set CC through a command-line flag
(#15785) vendor: update github.com/rjeczalik/notify for go1.10
(#15786) consensus/ethash: fix overdue link
(#15787) eth: enable preimage recording when tracing
(#15789) containers/docker: change docker images to go1.9
(#15790) cmd/utils/flags.go: Applying a String len guard for the gitCommit param of the NewApp()
(#15792) eth: uncaptialize tracer preimage error message
(#15793) various: remove redundant parentheses
(#15799) eth: fix tracer panic when running without configs + reexec
(#15800) eth: revert tracer preimage recording
(#15801) vendor: update github.com/rjeczalik/notify
(#15802) whisper/whisperv6: implement pow/bloom exchange protocol
(#15806) tests: update to upstream commit 2bb0c3da3b
(#15807) cmd/ethkey: fix formatting, review nits
(#15808) all: update generated code
(#15811) whisper: fix empty topic
(#15813) dashboard: use balanced trees to include binary data
(#15828) eth/gasprice: set default percentile to 60%, count blocks instead of transactions
(#15830) all: regenerate codecs with gencodec commit 90983d99de
(#15832) accounts/abi/bind: support event filtering in abigen
(#15836) rpc: Support specifying HTTP client in RPC dialing
(#15837) dashboard: deep state update, version in footer
(#15842) consensus/ethash: fix byzantium difficulty comment typo
(#15849) travis.yml: remove alias for 'cd' to avoid hang on macOS
(#15850) common/fdlimit: Move fdlimit files to separate package
(#15863) cmd/geth: user friendly light miner error
(#15864) consensus/ethash: improve cache/dataset handling
(#15869) ethstats: Fix ethstats reporting while syncing
(#15883) miner: avoid unnecessary work
(#15889) Revert "trie: make fullnode children hash calculation concurrently (*15131)"
(#15902) core/vm: Fix comment typo
(#15914) accounts/abi/bind/backends: fix comment typo
(#15934) Chain indexer fix + new CHT
(#15941) core: sorted reorg insertion order for proper head header updating
(#15946) p2p/discv5: fix topic register panic at shutdown
(#15948) p2p/discv5: logs info about discv5 node info at bind time
(#15950) dashboard: CPU, memory, diskIO and traffic on the footer
(#15954) cmd, params: update discovery v5 bootnodes
(#15971) ethapi: add personal.signTransaction
(#15972) whisper: remove linter warnings
(#15974) les: fix TxStatusMsg RLP coding
(#15977) accounts: fix comment typo
(#15987) internal: fix a typo that caused a lint error on travis
(#15988) vendor: update leveldb to 211f780 (poolfix)

Bumps go-musicoin to 2.5.4-beta

Musicoin / go-musicoin

Merge go-ethereum updates into 2.5.4 #77