* master:
  go/neo/neonet: errgroup -> xsync.WorkGroup

See kirr/go123@515a6d14

See go123@515a6d14

- without registering M to tracer it was failing as

  BenchmarkGetObjectNetPipe
      neo_test.go:491: main: expect: *neo.eventMStartReady:
          want: &{m true}
          have: &{ true}
          diff:  {
          - Where: "m",
          + Where: "",
            Ready: true,
           }

- Client is now required to be explicitly Run, but I forgot to update
  thi function in eae3b427.

* master:
  go/*: Adapt to xnet.Networker changes wrt Listen and cancellation
  go/internal/xtesting: DrvTestWatch: Verify that watching works with empty transactions
  go/zeo: tests: Terminate spawned processses with SIGTERM instead of SIGKILL
  go/zodb/zeo: Factor-out verifying empty database into xtesting.DrvTestEmptyDB
  go/neo/t: .nxdtest: nxdtest changes summaryf signature to include stderr

See

	kirr/go123@3354b401
and

	kirr/go123@b03d65ff

The wrapping logic in LinkListener goes away because Accept from xnet
now supports cancellation.

previously

- we were explicitly calling it on errors.Cause(err)
- and not in every place.

See

	go123@3354b401
and

	go123@b03d65ff

The wrapping logic in LinkListener and requireIdentifyHello goes away
because Accept from xnet now supports cancellation.