This release resolves proxy hang issue during initial protocol negotiation, users using proxy should upgrade.
io.grpc.grpclb that has SRV record lookup enabled by default (#6298). This allows using grpclb without the -Dio.grpc.internal.DnsNameResolverProvider.enable_grpclb=true system property. Note that grpclb is still experimental and deprecated. In particular, we plan to change grpclb policy selection which together with this change provides a path forward for grpclb to function without custom support in grpc-core; see gRFC A26