Assign hostname and IP address to ZFS file server

We need to assign hostname and IP address to a new ZFS file server (Dell R740). The proposed hostname "rfd1-vm" is named after other physical servers, although this is not a VM host. "*-infra" was suggested by yuki.moritani. Also we could do away with this naming convention for Dell server hardware and use something more sensible, e.g., "fs1-infra". The proposed IP address is the next available one for "*-vm" and "*-infra".