Block a Coinbase phisher

<https://dvrforcctvdns.135-237-45-132.sslip.io/sign/index.html>

From DoppelSupport24:

> Please review this site and suspend the services of the domain as soon
as possible

[fixes #89]

Author: cunnie

etc/blocklist.txt

@@ -731,3 +731,4 @@ raiffeisen # https://www.rbinternational.com/en/homepage.html
 89.23.103.58/32 # don't know, but Namecheap wants 'em shut down
 93.127.160.4/32 # apple.com
 48.216.217.16/32 # coinbase
+135.237.45.132/32 # coinbase