* The jailer can now be configured to enter a preexisting network namespace,
and to run as a daemon.
* Enabled PATCH operations on /drives resources.

Changed

* The microVM id supplied to the jailer may now contain alphanumeric characters
and hyphens, up to a maximum length of 64 characters.
* Replaced the permissions property of /drives resources with a boolean.
* Removed the state property of /drives resources.