Add regress test testing having the root cert in the intermediate bundle

Provide tools to build certificate changes for verify regress.

This provides a script that generates a variety of certificate chains
and assembles them into bundles containing various permutations,

Provide tools to build certificate changes for verify regress.

This provides a script that generates a variety of certificate chains
and assembles them into bundles containing various permutations, which
can be used to test our X.509 verification.

A Go program is included to verify each of these bundles.

ok beck@ tb@

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