Merge branch 'master' into docker-centos

* master:
  add changelog for 1.11.8 stable and 2.0.1 beta (#9230)
  fix typo (#9232)
  Fix potential as_usize overflow when casting from U256 in miner (#9221)
  Allow old blocks from peers with lower difficulty (#9226)
  Removes duplicate libudev-dev from Dockerfile (#9220)
  snap: remove ssl dependencies from snapcraft definition (#9222)
  remove ssl from dockerfiles, closes #8880 (#9195)