* bump beta to 2.2.5
* Fix empty steps (#9939)
* Don't send empty step twice or empty step then block.
* Perform basic validation of locally sealed blocks.
* Don't include empty step twice.
* Strict empty steps validation (#10041)
* Add two failings tests for strict empty steps.
* Implement strict validation of empty steps.
* ethcore: enable constantinople on ethereum (#10031)
* ethcore: change blockreward to 2e18 for foundation after constantinople
* ethcore: delay diff bomb by 2e6 blocks for foundation after constantinople
* ethcore: enable eip-{145,1014,1052,1283} for foundation after constantinople
* Change test miner max memory to malloc reports. (#10024)
* Fix: test corpus_inaccessible panic (#10019)
If system uptime is less than the duration in the test, thread
will panic due to: 'overflow when subtracting duration from instant'.
Changed duration to 20 seconds to make it unlikely the test will
fail due to this condition.
Since no operations that carry a similar risk of panic occur outside
of the tests, it doesn't seem warranted to depend on an external crate
to fix this.
* Bump crossbeam. (#10048)
* Update `add_license` script
* run script
* add `remove duplicate lines script` and run it
* Revert changes `English spaces`
* strip whitespaces
* Revert `GPL` in files with `apache/mit license`
* don't append `gpl license` in files with other lic
* Don't append `gpl header` in files with other lic.
* re-ran script
* include c and cpp files too
* remove duplicate header
* rebase nit
* do more validation of imported headers in light client
* generalize informant with traits
* informant implementation for light client
* make comment into TODO
* fix broken test
* disable full checking of headers in light client in sync tests
