[Merge] ~xnox/shim/+git/shim-signed:external-full-shim into ~ubuntu-core-dev/shim/+git/shim-signed:master

[Steve Langasek]

Review: Approve

I still find the use of "external" confusing because it's not really documented what that should be, but I do think this is an improvement
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https://code.launchpad.net/~xnox/shim/+git/shim-signed/+merge/402629
Your team Ubuntu Core Development Team is requested to review the proposed merge of ~xnox/shim/+git/shim-signed:external-full-shim into ~ubuntu-core-dev/shim/+git/shim-signed:master.