gRPC-go Release 1.38.0

[Easwar Swaminathan]

gRPC-go 1.38.0 is now released.

Please see release at: https://github.com/grpc/grpc-go/releases/tag/v1.38.0

Full release notes:

API Changes

• reflection: accept interface instead of grpc.Server struct in Register() (#4340)
• resolver: add error return value from ClientConn.UpdateState (#4270)

Behavior Changes

• client: do not poll name resolver when errors or bad updates are reported (#4270)
• transport: InTapHandle may return RPC status errors; no longer RST_STREAMs (#4365)

New Features

• client: propagate connection error causes to RPC status (#4311, #4316)
• xds: support inline RDS resource from LDS response (#4299)
• xds: server side support is now experimentally available
• server: add ForceServerCodec() to set a custom encoding.Codec on the server (#4205)
• Special Thanks: @ash2k

Performance Improvements

• metadata: reduce memory footprint in FromOutgoingContext (#4360)
• Special Thanks: @irfansharif

Bug Fixes

• xds/balancergroup: fix rare memory leak after closing ClientConn (#4308)

Documentation

• examples: update xds examples for PSM security (#4256)
• grpc: improve docs on StreamDesc (#4397)