stubby: update homepage

Resolution:

stubby.meta.homepage
→ https://dnsprivacy.org/wiki/x/JYAT
→ HTTP 302 https://dnsprivacy.org/wiki/pages/tinyurl.action?urlIdentifier=JYAT
→ HTTP 302 https://dnsprivacy.org/wiki/display/DP/DNS+Privacy+Daemon+-+Stubby
→ HTTP 301 https://dnsprivacy.org/wiki/display/DP/DNS+Privacy+Daemon+-+Stubby/
→ meta refresh http://dnsprivacy.org/dns_privacy_daemon_-_stubby/
→ HTTP 301 https://dnsprivacy.org/dns_privacy_daemon_-_stubby/

pkgs/development/libraries/getdns/default.nix

···
           Privacy resolver increasing end user privacy. Stubby is developed by
           the getdns team.
         '';
-        homepage = "https://dnsprivacy.org/wiki/x/JYAT";
+        homepage = "https://dnsprivacy.org/dns_privacy_daemon_-_stubby/";
       };
   };