gRPC-go Release 1.20.0

[Doug Fawley]

gRPC-go 1.20.0 is now released. Full release notes:

API Changes

• balancer: remove Header from PickOptions; it is also available through context (#2674)

Behavior Changes

• transport: remove RequireHandshakeHybrid support (#2529)

New Features

• credentials: add compute engine creds (#2708)
• grpclb: fallback after init (#2681)
• server: improve error message when an unknown method is invoked. (#2723)
• balancer: add server loads from RPC trailers to DoneInfo (#2641)
• service config: default service config (#2686)
• bar: add ability to update resolver state atomically and pass directly to the balancer (#2693)
• stats: add Trailer to client-side stats.End (#2639)
  • Special Thanks: @mklencke

Bug Fixes

• internal: update golang.org/x/lint dependency (#2690)
• syscall: remove logging in init(). (#2734)
  • Special Thanks: @yangminzhu
• transport: do not close channel that can lead to panic (#2695)
  • Special Thanks: @aanm
• grpclb: drop only when at least one SubConn is ready (#2630)
• stats: add WireLength to stats.InPayload (#2711)
  • Special Thanks: @ilylia
• client: restore remote address in traces (#2718)
• server: send RST_STREAM after trailers if client has not half-closed (#2684)
• channelz: cleanup channel registration if Dial fails (#2733)
• client: handle HTTP header parsing error correctly (#2599)
• grpclb: keep drop index unless a new serverlist is received (#2631)
• client: reset backoff to 0 after a connection is established (#2669)
• dns: prefixing txt record lookup with "_grpc_config." (#2691)
• balancer: make sure non-nil done returned by Pick is called (#2688)

Please see release at: https://github.com/grpc/grpc-go/releases/tag/v1.20.0