* core/vm: track 63/64 call gas off stack

Gas calculations in gasCall* relayed the available gas for calls by
replacing it on the stack. This lead to inconsistent traces, which we
papered over by copying the pre-execution stack in trace mode.

This change relays available gas using a temporary variable, off the
stack, and allows removing the weird copy.

* core/vm: remove stackCopy

* core/vm: pop call gas into pool

* core/vm: to -> addr

cmd/utils: bootstrap nodes in config file were not respected

* trie: make fullnode children hash calculation concurrently

* trie: thread out only on topmost fullnode

* trie: clean up full node children hash calculation

* trie: minor code fixups

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

* Disallow --lightserv in light mode

* Reformatted

* cmd/utils: reduce nesting levels a bit

core/state: copy trie too, not just content

swarm/api: bug fix exact match for manifest

accounts/keystore: change modtime for test case files to be bigger than 1sec.

* 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

internal/ethapi: avoid recreating JavaScript tracer wrappers

* console: fix typo in comment

* contracts/release: fix typo in comment

* core: fix typo in comment

* eth: fix typo in comment

* miner: fix typo in comment

* cmd: fix typo in comment

* cmd/puppeth: tiny comment fixup

cmd/puppeth: new version as presented at devcon3

build: fix typo in comment

les: clean up tx journal file after testing