* cmd, dashboard: remove custom assets, webpack dev server

* dashboard: yarn commands, small fixes

* utils: fix #16138 by checking if vhosts flag is set

* utils,node: fix defaults for rpcvhosts

* node,utils: address review concerns

* cmd,node,rpc: add allowedHosts to prevent dns rebinding attacks

* p2p,node: Fix bug with dumpconfig introduced in r54aeb8e4

* rpc: add wildcard support for rpcallowedhosts + go fmt

* cmd/geth, cmd/utils, node, rpc: ignore direct ip(v4/6) addresses in rpc virtual hostnames check

* http, rpc, utils: make vhosts into map, address review concerns

* node: change log messages to use geth standard (not sprintf)

* rpc: fix spelling

This commit reduces database I/O by not writing every state trie to disk.

* les: limit number of LES connections

* eth, cmd/utils: light vs max peer configuration logic

This commit affects p2p/discv5 "topic discovery" by running it on
the same UDP port where the old discovery works. This is realized
by giving an "unhandled" packet channel to the old v4 discovery
packet handler where all invalid packets are sent. These packets
are then processed by v5. v5 packets are always invalid when
interpreted by v4 and vice versa. This is ensured by adding one
to the first byte of the packet hash in v5 packets.

DiscoveryV5Bootnodes is also changed to point to new bootnodes
that are implementing the changed packet format with modified
hash. Existing and new v5 bootnodes are both running on different
ports ATM.

* dashboard: footer, deep state update

* dashboard: resolve asset path

* dashboard: remove bundle.js

* dashboard: prevent state update on every reconnection

* dashboard: fix linter issue

* dashboard, cmd: minor UI fix, include commit hash

* remove geth binary

* dashboard: gitCommit renamed to commit

* dashboard: move the geth version to the right, make commit optional

* dashboard: commit limited to 7 characters

* dashboard: limit commit length on client side

* dashboard: run go generate

* common/fdlimit: Move fdlimit files to separate package

When go-ethereum is used as a library the calling program need to set
the FD limit.

This commit extract fdlimit files to a separate package so it can be
used outside of go-ethereum.

* common/fdlimit: Remove FdLimit from functions signature

* common/fdlimit: Rename fdlimit functions

* cmd/utils/flags.go: Applying a String len guard for the gitCommit param of the NewApp()

* cmd/utils: remove redundant clause in if condition

Signed-off-by: NMaximilian Meister <mmeister@suse.de>

* Disallow --lightserv in light mode

* Reformatted

* cmd/utils: reduce nesting levels a bit

* cmd, consensus, eth: split ethash related config to it own

* eth, consensus: minor polish

* eth, consenus, console: compress pow testing config field to single one

* consensus, eth: document pow mode

* cmd, dashboard: dashboard using React, Material-UI, Recharts

* cmd, dashboard, metrics: initial proof of concept dashboard

* dashboard: delete blobs

* dashboard: gofmt -s -w .

* dashboard: minor text and code polishes

* cmd, consensus, core, miner: instatx clique for --dev

* cmd, consensus, clique: support configurable --dev block times

* cmd, core: allow --dev to use persistent storage too

* core: reduce txpool event loop goroutines and sync structs

* cmd, core, eth: journal local transactions to disk

* core: journal replacement pending transactions too

* core: separate transaction journal from pool