This can be seen via System(). In the PKI backend, if the CA is
reconfigured but not fully (e.g. an intermediate CSR is generated but no
corresponding cert set) and there are already leases (issued certs), the
CRL is unable to be built. As a result revocation fails. But in this
case we don't actually need revocation to be successful since the CRL is
useless after unmounting. By checking taint status we know if we can
simply fast-path out of revocation with a success in this case.
Fixes#946
This commit splits ACL policies into more fine-grained capabilities.
This both drastically simplifies the checking code and makes it possible
to support needed workflows that are not possible with the previous
method. It is backwards compatible; policies containing a "policy"
string are simply converted to a set of capabilities matching previous
behavior.
Fixes#724 (and others).
