gRPC-Core Release 1.34.0

[Yulin Liang]

This is 1.34.0 (gauntlet) release announcement for gRPC-Core and the wrapped languages C++, C#, Objective-C, Python, PHP and Ruby. Latest release notes are here.

This release contains refinements, improvements, and bug fixes, with highlights listed below.

Core

• Protect xds security code with the environment variable "GRPC_XDS_EXPERIMENTAL_SECURITY_SUPPORT". (#24782)
• Add support for "unix-abstract:" URIs to support abstract unix domain sockets. (#24500)
• Increment Index when parsing not plumbed SAN fields. (#24601)
• Revert "Revert "Deprecate GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS"". (#24518)
• xds: Set status code to INVALID_ARGUMENT when NACKing. (#24516)
• Include stddef.h in address_sorting.h. (#24514)
• xds: Add support for case_sensitive option in RouteMatch. (#24381)
• Removing TLS workaround for Android NDK r12b. (#24283)

C++

• Fix --define=grpc_no_xds=true builds. (#24503)
• Experimental support and tests for CreateCustomInsecureChannelWithInterceptorsFromFd. (#24362)

C#

• Fix C# native library loading in .NET 5 single-file apps (backport to v1.34.x). (#24853)
• Make RIDs for the native dependencies in Grpc.Core arch specific. (#24766)
• Improve PlatformApis check for detecting Unity. (#24714)
• Fix to not require libc-dev on .NET 5 or later. (#24485)
• C#: Make Grpc.Core nuget slimmer by moving mobile support to Grpc.Core.Xamarin package. (#24380)
• C#: Stop supporting 32bit runtime for linux and macos . (#24378)
• Modernize C# HelloworldXamarin example. (#24425)

Objective-C

• Support swift package manager for grpc-core and grpc-cpp. (#24571)
• Add transport information into grpc-objc user-agent. (#24253)
• Bump iOS and OSX version. (#24282)

PHP

• PHP: add support for PHP 8 in PECL extension. (#24621)
• PHP: deprecate PHP 5 support from PECL extension. (#24353)

Python

• Incur setuptools as an dependency for grpcio_tools. (#24752)
• Stop the spamming log generated by ctrl-c for AsyncIO server. (#24718)
• [gRPC Easy] Make Well-Known Types Available to Runtime Protos. (#24478)
• Bump MACOSX_DEPLOYMENT_TARGET to 10.10 for Python. (#24480)
• Make Python 2 an optional dependency for Bazel build. (#24407)
• [Linux] [macOS] Support pre-compiled Python 3.9 wheels. (#24356)

Ruby

• Bump MACOSX_DEPLOYMENT_TARGET to 10.10 for Ruby. (#24479)