Fix race condition in whisperv6/peer.go

* core, vm, common: define constantinople fork, start implementation of shift instructions

* vm: more testcases

* vm: add tests for intpool erroneous intpool handling

* core, vm, common: fix constantinople review concerns

* vm: add string<->op definitions for new opcodes

* go-metrics: fork library and introduce ResettingTimer and InfluxDB reporter.

* vendor: change nonsense/go-metrics to ethersphere/go-metrics

* go-metrics: add tests. move ResettingTimer logic from reporter to type.

* all, metrics: pull in metrics package in go-ethereum

* metrics/test: make sure metrics are enabled for tests

* metrics: apply gosimple rules

* metrics/exp, internal/debug: init expvar endpoint when starting pprof server

* internal/debug: tiny comment formatting fix

eth, les, light: filter on logs only, derive receipts on demand

swarm: repeated --ens-api CLI flag (#14386)

* p2p: remove unused code

* p2p: remove unused imports

RPC Server readRequest method sets the serverRequest error service
value as the rpcRequest.method and this change sets it to the right
service value.

core: yeah, funny file, drop it

p2p/protocols, p2p/testing: protocol abstraction and testing

cmd/faucet: resolve twitter user from final redirect

cmd/puppeth: Don't allow hyphen in network name. Fixes #16155

accounts/abi: Fix the bug of mobile framework crashing

accounts/abi: add another unpack interface

* ethapi: prevent creating contract if no data is provided

* internal/ethapi: downcase error for no data on contract creation

This change removes a peer information from dialing history
when peer is removed from static list. It allows to force a
server to re-dial concrete peer if it is needed.

In our case we are running geth node on mobile devices, and
it is common for a network connection to flap on mobile.
Almost every time it flaps or network connection is changed
from cellular to wifi peers are disconnected with read
timeout. And usually it takes 30 seconds (default expiration
timeout) to recover connection with static peers after
connectivity is restored.

This change allows us to reconnect with peers almost
immediately and it seems harmless enough.

cmd, console: support all termination signals

* README: add goreportcard.com badge to Readme

* README: fix double github.com

* les: fix light fetcher database race

* les: lightFetcher comments

vendor: update rjeczalik/notify so that it compiles on go1.10

Handle all expectations in ProtocolSession.TestExchanges in any
order that are received.

p2p/discover: validate bond against lastpong, not db presence