The ACL token decoding was not correctly handling time duration
syntax such as "1h" which forced people to use the nanosecond
representation via the HTTP API.
The change adds an unmarshal function which allows this syntax to
be used, along with other styles correctly.
The ACL command docs are now found within a sub-dir like the
operator command docs. Updates to the ACL token commands to
accommodate token expiry have also been added.
The ACL API docs are now found within a sub-dir like the operator
API docs. The ACL docs now include the ACL roles endpoint as well
as updated ACL token endpoints for token expiration.
The configuration section is also updated to accommodate the new
ACL and server parameters for the new ACL features.
