* Remove redundant `eth/68` message and clean up docu
details:
There is only eth/68 available at the moment
* Allow to turn on chronicles line number logging in `Makefile`
* Accept (and forget) tx hashes announcements
why:
Does no harm to just ignore it at the moment
* Bump nim-eth (rlp fix)
* Update config for Ledger and CoreDb
why:
Prepare for tracer which depends on the API jump table (as well as
the profiler.) The API jump table is now enabled in unit/integration
test mode piggybacking on the `unittest2DisableParamFiltering`
compiler flag or on an extra compiler flag `dbjapi_enabled`.
* No deed for error field in `NodeRef`
why:
Was opnly needed by proof nodes pre-loader which will be re-implemented
* Cosmetics