Merge branch 'master' into refactor/substrate-state-machine-generic

* master:
  Less verbosity (#546)
  Fetching storage proofs by light client (#252)
  Gitlab CI build file for linux. (#552)
  Vote out offline authorities (#524)
  fix block body fetch for availability pruning (#539)
  Continue sync after ancestry search (#538)
  Docs Typo Fixes (#534)
  don't wait for all futures to resolve before shutdown (#536)
  Update libp2p and some log (#532)
  Mh public key for telemetry (#526)
  Td bps (#527)
  Reserved peers CLI flag (#528)