Fail DNS resolution if the result contains 127.0.53.53.
ICANN designated the IPv4 address 127.0.53.53 as meaning a name collision occurred during resolution (as a way to discover real world conflicts around the new gTLDs).
This change makes such resolutions now fail with:
ICANN_NAME_COLLISION.
IP literals are exempt from the policy and will continue to work as before (meaning you can still navigate to http://127.0.53.53).
This only affects IPv4 results.
BUG=470704
Review URL: https://codereview.chromium.org/1035803003
Cr-Commit-Position: refs/heads/master@{#322309}
3 files changed
