Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/boards/api/context.go

@@ -0,0 +1,32 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package api
+
+import (
+	"context"
+	"net"
+	"net/http"
+)
+
+type contextKey int
+
+const (
+	httpConnContextKey contextKey = iota
+	sessionContextKey
+)
+
+// SetContextConn stores the connection in the request context.
+func SetContextConn(ctx context.Context, c net.Conn) context.Context {
+	return context.WithValue(ctx, httpConnContextKey, c)
+}
+
+// GetContextConn gets the stored connection from the request context.
+func GetContextConn(r *http.Request) net.Conn {
+	value := r.Context().Value(httpConnContextKey)
+	if value == nil {
+		return nil
+	}
+
+	return value.(net.Conn)
+}