v1.60.0

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This is release 1.60.0 (gjallarhorn) of gRPC Core.

For gRPC documentation, see grpc.io. For previous releases, see Releases.

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

Core

• Implemented dualstack IPv4 and IPv6 backend support, as per draft gRFC A61. xDS support currently guarded by GRPC_EXPERIMENTAL_XDS_DUALSTACK_ENDPOINTS env var.
• Dropped Bazel 5 support. (#​34813)
• [deps] Upgrade protobuf version to v25.0. (#​34513)
• [Security - Revocation] Crl Directory Watcher Implementation. (#​34749)
• [server] Cap size of pending request queue with RealRequestMatcher. (#​34782)
• [chttp2] Fix outgoing data stats. (#​34693)
• [EventEngine] Enable Posix EventEngine Listener on all builds. (#​34748)
• [EventEngine] Enable Windows EventEngine Listener on all builds. (#​34436)
• [chttp2] Alternative protection for too many streams in the system. (#​34697)
• [Proxy] Support for setting proxy for addresses. (#​34617)
• [client idleness] client channels go idle after 30 minutes by default. (#​34653)
• [chttp2] Add an experiment to separate liveness checks from ping timeouts. (#​34647)
• [chttp2] Tarpit invalid requests. (#​34641)
• [chttp2] Enforce settings acks. (#​34640)
• [chttp2] Limit work per read cycle. (#​34639)
• [chttp2] Limit request count before receiving settings ack. (#​34638)
• [chttp2] Randomly ping on RST_STREAM. (#​34637)

C++

• [xds] C++ XdsServerBuilder Remove src/... header dependency from public header. (#​34790)
• [reflection] Add v1 reflection. (#​34535)

C#

• [csharp] Grpc.Tools documentation for sharing proto files between projects and nuget packages. (#​34521)

Ruby

• [ruby] create debug symbol packages. (#​34632)