Fix #1662, allow URLs with IP addresses, or more generally URLs where the domain ends in a number
Fix #1662, allow URLs with IP addresses, or more generally URLs where the domain ends in a number

mozilla-services/screenshots,mozilla-services/pageshot,mozilla-services/screenshots,fzzzy/pageshot,mozilla-services/screenshots,fzzzy/pageshot,mozilla-services/pageshot,fzzzy/pageshot,fzzzy/pageshot,mozilla-services/pageshot,mozilla-services/pageshot,mozilla-services/screenshots