* Ban Peers via CLI
As part of working on #251 I needed to be able to ban certain nodes from my
connection pool and let others connect. This is a general solution to add
a --banned-nodeids CLI flag where the nodeIds of banned nodes are listed.
* Introduce ProtocolScheduleBuilder and use it for Clique, MainNet, IBFT and dev.
* Remove default milestone blocks and simplify MainnetProtocolSchedule. All milestone blocks must now be defined in the genesis file (previously ethash chains would get Mainnet milestone blocks by default).
* Make GenesisConfigFile responsible for handling all the content in the genesis config file and rename GenesisConfig to GenesisState as it is now just responsible for creating the initial state at genesis.
* In CliqueProtocolController, pass the network ID to EthProtocolManager instead of the chain ID and use downloader parallelism setting instead of network ID for the number of threads.
As recommended in #231 alter the API so that the
subclasses always return their list from executePeerTask in the
`CompletableFuture` and reset the retry in `#executeTask()` when any
non-empty list is returned.
* Fix corner case where Memory did not clear target destination if the new bytes to set was empty.
* Use BytesValue.EMPTY instead of Bytes32.EMPTY to make it clear that it's a 0 length BytesValues rather than 32 bytes of zeross.
* Treat outputLength for call operations as a maximum length - when the actual data to output is shorter than outputLength, do not zero out the tail end of the memory range.
A more robust fix: be tolerant of partial success. Instead of counting
every call as a limited retry change the semantics of
AbstractRetryingPeerTask such that it's retryCounter may be reset on a
partial success. Hence the limit is on consecutive zero progress
retries and large blocks dribbled in one at a time are not penalized.
Undo temp fix. Restore retries to 3 in a row.
* Don't rely on sun.security.krb5.Confounder.bytes.
It's not reflected as part of the JDK platform and makes IDEs cranky.
* Use a better SecureRandom factory.
* spotless
* Introduce classes to wrap JSON config instead of accessing it directly in multiple places.
* Fix discrepancy in how CliqueProtocolSchedule and CliquePantheonController loaded the block period configuration.
We can write directly to the target instead and avoid the caller needing to release the buffer.
Fixes memory leak when clients are repeatedly connecting and disconnecting.