librdkafka v1.9.1

librdkafka v1.9.1 is a maintenance release:

• The librdkafka.redist NuGet package now contains OSX M1/arm64 builds.
• Self-contained static libraries can now be built on OSX M1 too, thanks to
  disabling curl's configure runtime check.

Checksums

Release asset checksums:

• v1.9.1.zip SHA256 d3fc2e0bc00c3df2c37c5389c206912842cca3f97dd91a7a97bc0f4fc69f94ce
• v1.9.1.tar.gz SHA256 3a54cf375218977b7af4716ed9738378e37fe400a6c5ddb9d622354ca31fdc79