Merge branch 'master' into t

* master: (29 commits)
  go/zodb: Tweak documentation a bit so it renders more well in godoc
  go/neo/t/nxd/runTestSuite: Also run go & py unit tests in addition to bench-local
  go/neo/t/nxd/runTestSuite: Tee tested process stdout,stderr to testnode logs incrementally
  go/neo/t/nxd/runTestSuite: New wrapper to run neotest as part of Nexedi testing infrastructure
  go/neo/t/benchplot: New program to visualise neotest benchmarks (draft)
  go/neo/t/neotest: Add bench-local and bench-cluster commands
  go/internal/xzlib: Switch to github.com/DataDog/czlib to zlib Decompression
  go/internal/xzlib: Try to reuse zlib decoders
  go/neo/t/neotest: bench-cpu += unzlib for wczblk1 and prod1 objects
  go/neo/t/neotest: Switch to zwrk to simulate parallel load from multiple clients
  go/zodb: Allow to open a storage in "direct" mode - without local cache
  go/neo/t/neotest: ZODB benchmarks
  go/neo/t/neotest: Network information & benchmarks
  go/neo/t/neotest: Disk information & benchmarks
  go/neo/t/neotest: CPU information & benchmarks
  go/neo/t: Neotest start
  go/zodb/zeo: Add support for protocols preceding ZEO5
  go/zodb: Teach ZODB/go to access ZEO (draft)
  go/zodb: Start putting pickle-related utilities into internal/pickletools package
  go/neo/neonet: Lightweight mode
  ...