* Command=line options.
* Keep alive for the eth protocol.
* Wire up final pieces.
* No network when dark.
* Passive and dark mode work.
* Ensure all RPCs keep alive.
* Fix tests.
* Fix minor bug.
* Minor whitespace.
* Split out some of the sleep-state.
* Fix help text.
* use bloomchain crate in blockchain module. remove obsole chainfilter submodule
* update database version to 6.0
* removed redundant line
* simple db migration
* make migration slightly more functional
* bloomchain migration
* migration version is just a single unsigned integer
* updated migration v6
* parity migration
* db migration
* removed hardcoded migration dir
* replace ptr::copy with clone_from_slice, removed potential endianess problem from trace/db.rs
* removed superfluous line
* blockchains log blooms config is not exposed any more