Soheil Hassas Yeganeh 7b740c1fa6 Modernize for current Go toolchains ...

The library already compiled and passed tests, but tooling and
dependencies were stale. This brings everything up to current standards
without changing public behavior.

Library (go 1.23.0):
- cmux_test.go: fix 8 `go vet` failures by sending writer-goroutine
  errors to the existing errCh (now buffered) instead of t.Fatal;
  ioutil.ReadAll -> io.ReadAll
- matchers.go: io/ioutil -> io (io.Discard); gofmt -s doc comment
- go.mod: go 1.11 -> 1.23.0; golang.org/x/net -> v0.42.0 (newest
  release that still permits a 1.23 directive)

Example submodule:
- golang.org/x/net/context -> stdlib context
- grpc v1.27.0 -> v1.80, modern protobuf; helloworld now comes from
  the separate google.golang.org/grpc/examples module (requires go 1.25,
  isolated to this demo-only module)

CI:
- remove ancient .travis.yml (Go 1.6-1.8)
- add .github/workflows/ci.yml: gofmt/vet/build/test -race for the
  library (Go 1.23 + 1.24 matrix) and the example

Temporary() methods and TLS version defaults are intentionally
unchanged: net.Error still requires Temporary(), and the TLS defaults
are public-API behavior.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-06-07 23:38:42 -04:00

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