This patch is only needed by the latest version of handlersocket, which is not part of current MariaDB. As there is no way to test or use this patch, we are not including this in MariaDB at this point in time.
If and when handlersocket is updated, then this patch can be revisited.
Spiral patch 20, for bulk access in the partition engine, was integrated in branch bb-10.2-spider-extra-jacob in the following commit: 6e2e040