wmfusercontent.org - use misc-web-lb in eqiad

we wanted to use misc-web-lb in eqiad, not

misc-web-lb.eqiad.wmfusercontent.org. which doesn't exist

dig A phab.wmfusercontent.org @ns0.wikimedia.org

Change-Id: If62d1799c05a50320f1cffd4e1640fda7e515307