Updated public-resolvers to v3

[x] Updated public-resolvers to v3
[x]  Reverted to master with a much simpler .toml file
[ ]  Trial performance with pihole after disabling DNScrypt cache'ing

Author: xtr0py

config/dnscrypt-proxy.toml

@@ -393,7 +393,7 @@ cache_neg_ttl = 60
   ## An example of a remote source
 
   [sources.'public-resolvers']
-  urls = ['https://raw.githubusercontent.com/DNSCrypt/dnscrypt-resolvers/master/v2/public-resolvers.md', 'https://download.dnscrypt.info/resolvers-list/v2/public-resolvers.md']
+  urls = ['https://raw.githubusercontent.com/DNSCrypt/dnscrypt-resolvers/master/v3/public-resolvers.md', 'https://download.dnscrypt.info/resolvers-list/v3/public-resolvers.md']
   cache_file = 'public-resolvers.md'
   minisign_key = 'RWQf6LRCGA9i53mlYecO4IzT51TGPpvWucNSCh1CBM0QTaLn73Y7GFO3'
   refresh_delay = 72