* updater: apply exponential backoff after download failure (#8059)
* updater: apply exponential backoff after download failure
* updater: reset backoff on new release
* Limit incoming connections. (#8060)
* Limit ingress connections
* Optimized handshakes logging
* Max code size on Kovan (#8067)
* Enable code size limit on kovan
* Fix formatting.
* add some dos protection (#8084)
* more dos protection (#8104)
* Const time comparison (#8113)
* Use `subtle::slices_equal` for constant time comparison.
Also update the existing version of subtle in `ethcrypto` from
0.1 to 0.5
* Test specifically for InvalidPassword error.
* revert removing blooms (#8066)
* Revert "fix traces, removed bloomchain crate, closes#7228, closes#7167"
This reverts commit 1bf62038678295e5586f02a38a0c5aab9a9efe62.
* Revert "fixed broken logs (#7934)"
This reverts commit f8a2e53f3e.
* fixed broken logs
* bring back old lock order
* remove migration v13
* revert CURRENT_VERSION to 12 in migration.rs
* Fix compilation.
* Check one step deeper if we're on release track branches
* add missing pr
* Fix blooms?
* Fix tests compiilation.
* Fix size.
* move common forks and parameters to common params
* port specs over to new format
* fix RPC tests
* parity-machine skeleton
* remove block type
* extract out ethereum-specific methods into EthereumMachine
* beginning to integrate Machine into engines. dealing with stale transitions in Ethash
* initial porting to machine
* move block reward back into engine
* abstract block reward logic
* move last hash and DAO HF logic into machine
* begin making engine function parameters generic
* abstract epoch verifier and ethash block reward logic
* instantiate special ethereummachine for ethash in spec
* optional full verification in verify_block_family
* re-instate tx_filter in a way that works for all engines
* fix warnings
* fix most tests, further generalize engine trait
* uncomment nullengine, get ethcore tests compiling
* fix warnings
* update a bunch of specs
* re-enable engine signer, validator set, and transition handler
* migrate basic_authority engine
* move last hashes into executedblock
* port tendermint
* make all ethcore tests pass
* json-tests compilation
* fix RPC tests: change in gas limit for new block changed PoW hash
* fix minor grumbles
* validate chainspecs
* fix broken import
* fix transaction verification for pre-homestead
