Update Adblock lists (#1394)

Uses the Unified hosts file from @StevenBlack available [here](https://github.com/StevenBlack/hosts). This encompasses the Ad Away, MVPS, and Malware Domain lists, deleting duplicates for us, and also adds a bunch more.

config.cfg

@@ -70,9 +70,7 @@ reduce_mtu: 0
 # If you load very large blocklists, you may also have to modify resource limits:
 # /etc/systemd/system/dnsmasq.service.d/100-CustomLimitations.conf
 adblock_lists:
- - "http://winhelp2002.mvps.org/hosts.txt"
- - "https://adaway.org/hosts.txt"
- - "https://www.malwaredomainlist.com/hostslist/hosts.txt"
+ - "https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts"
  - "https://hosts-file.net/ad_servers.txt"
 
 # Enable DNS encryption.