api: acme meta: require Sys.Audit on the node

api: acme meta: require Sys.Audit on the node

As even though restricted to some specific endpoints and formats, one
can still scan HTTP, potentially also on the LAN.

We can do this here as the API call is new and was never packaged
since introduced, so this isn't a breaking change.
The TOS one will be removed with the next major release, so not a
problem anymore from then one.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>