Public servers list suggestions

[Larivact]

Suggestions for https://dnscrypt.info/public-servers:

• Explain where the list data comes from. How can one add a server?
• Show server addresses (otherwise the list is quite useless).
• Add tooltips to symbols (the block symbol isn't explained anywhere).
• Make URLs in descriptions clickable.
• Make the table properly responsive (instead of simply hiding columns when the browser is too narrow).

[ibksturm]

Suggestions for https://dnscrypt.info/public-servers:

• Explain where the list data comes from. How can one add a server?

hi @Larivact you can add some servers here https://github.com/DNSCrypt/dnscrypt-resolvers/blob/master/v2/public-resolvers.md