instanceinfo: Improve Mastodon fork detection.

instanceinfo.sh

@@ -87,7 +87,9 @@ function parse_nodeinfo()
         jq -rj ".metadata.library.artists.total" <<<"${json}"
         echo -n " / "
         jq -r ".metadata.library.tracks.total" <<<"${json}"
-    elif [[ "${implementation}" == "mastodon" ]]; then
+    elif [[ "${implementation}" == "mastodon" ]] ||
+             [[ "${implementation}" =~ don$ ]] ||
+             [[ "${implementation}" =~ ^masto ]]; then
         echo -e "\nUsing Mastodon API additionally."
         parse_mastodon ${instance} "https://${instance}/api/v1/instance"
     elif [[ "${implementation}" == "pixelfed" ]]; then