* WIP: Get rid of request multiplexer.
* WIP
* Receiver for handling of incoming requests.
* Get rid of useless `Fault` abstraction.
The things the type system let us do are not worth getting abstracted in
its own type. Instead error handling is going to be merely a pattern.
* Make most things compile again.
* Port availability distribution away from request multiplexer.
* Formatting.
* Port dispute distribution over.
* Fixup statement distribution.
* Handle request directly in collator protocol.
+ Only allow fatal errors at top level.
* Use direct request channel for availability recovery.
* Finally get rid of request multiplexer
Fixes#2842 and paves the way for more back pressure possibilities.
* Fix overseer and statement distribution tests.
* Fix collator protocol and network bridge tests.
* Fix tests in availability recovery.
* Fix availability distribution tests.
* Fix dispute distribution tests.
* Add missing dependency
* Typos.
* Review remarks.
* More remarks.
* Remove signature verification in backing.
`SignedFullStatement` now signals that the signature has already been
checked.
* Remove unused check_payload function.
* Introduced unchecked signed variants.
* Fix inclusion to use unchecked variant.
* More unchecked variants.
* Use unchecked variants in protocols.
* Start fixing statement-distribution.
* Fixup statement distribution.
* Fix inclusion.
* Fix warning.
* Fix backing properly.
* Fix bitfield distribution.
* Make crypto store optional for `RuntimeInfo`.
* Factor out utility functions.
* get_group_rotation_info
* WIP: Collator cleanup + check signatures.
* Convenience signature checking functions.
* Check signature on collator-side.
* Fix warnings.
* Fix collator side tests.
* Get rid of warnings.
* Better Signed/UncheckedSigned implementation.
Also get rid of Encode/Decode for Signed! *party*
* Get rid of dead code.
* Move Signed in its own module.
* into_checked -> try_into_checked
* Fix merge.
Robert Klotzner