Behavior Changes

• xds: enable federation support by default (#6151)
• status: status.Code and status.FromError handle wrapped errors (#6031 and #6150)
  • Special Thanks: @psyhatter

New Features

• xds/xdsclient: support ignore_resource_deletion server feature as per gRFC A53 (#6035)
• security/advancedtls: add min/max TLS version selection options (#6007)
  • Special Thanks: @joeljeske

Bug Fixes

• xds: stop routing RPCs to deleted clusters (#6125)
• client: fix race between stream creation and GOAWAY receipt, which could lead to spurious UNAVAILABLE stream errors (#6142)

Performance Improvements

• server: improve stream handler goroutine worker allocation when NumStreamWorkers is used (#6004)
  • Special Thanks: @SaveTheRbtz