From 2dd0b00397b94932d3a662b5eaf2a872a87c6f54 Mon Sep 17 00:00:00 2001
From: Nick Jones <dntj@users.noreply.github.com>
Date: Wed, 30 Jan 2019 09:39:46 +1100
Subject: [PATCH] fix: envconfig.RequireHandshake initialization when `on`.

https://github.com/grpc/grpc-go/commit/6cc789b34b72d30116d6139ae4af87d5bfc91478 made `envconfig.RequireHandshakeOn` the default when unspecified by environment variable, but missed a fallthrough leading to `GRPC_GO_REQUIRE_HANDSHAKE=on` specifying `envconfig.RequireHandshakeHybrid`.
---
 internal/envconfig/envconfig.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/internal/envconfig/envconfig.go b/internal/envconfig/envconfig.go
index d2193b3a21bb..62ed0f2f1200 100644
--- a/internal/envconfig/envconfig.go
+++ b/internal/envconfig/envconfig.go
@@ -59,6 +59,7 @@ var (
 func init() {
 	switch strings.ToLower(os.Getenv(requireHandshakeStr)) {
 	case "on":
+		fallthrough
 	default:
 		RequireHandshake = RequireHandshakeOn
 	case "off":