Comment 20 for bug 1790724

Verification done on xenial:

ii shim 15+1533136590.3beb971-0ubuntu1
ii shim-signed 1.33.1~16.04.2+15+1533136590.3beb971-0ubuntu1

Verified that shim + shim-signed boot normally on a Xenial system. Timeout can be set (using a newer mokutil than is available on xenial), and certificates can be imported successfully.