Put stat1001.wikimedia.org behind misc-web-lb in preparation for move to private IP next week.

stat1001.wikimedia.org redirects to datasets.wikimedia.org, and we want the redirect to stay
intact even after the move to a private IP in the Analytics VLAN next week.

Change-Id: I81ecd6c5debbf80a62231f2b4f890826be0b0d5d