This core will be used as the new base for the reuse branch, which is
essentiall the same as the existing template branch, except that it is
rebased from this core, simplifying future rebasing.
Resolves#6 by breaking out the disabling of mitigations into it's own module.
Now users must explicitly accept the risk of disabling Spectre and Meltdown
mitigations with `security.mitigations.acceptRisk` in addition to actually
disabling them with `security.mitigations.disable`.