Specifically this pulls in the following:
https://go-review.googlesource.com/12717https://go-review.googlesource.com/17247
These fix bugs users have encountered -- the first with the PKI backend,
and the second with Vault generally, as it can bite any use of a
certificate within Vault (listener, cert credential backend, pki
backend).
These are in 1.6, but it will probably be released too late for us given
what is currently known about their release plans and our known
deadline. This lets us build our releases against a patched 1.5.3.
b2ab68f814