Removing search.asynchronousexchange.com for no IPv4 endpoint

[unixfox]

Hello @anders-baerbock,

We are removing temporarily search.asynchronousexchange.com because there is no IPv4 server available on the domain.

The reason for that is that we currently have no way to tell the user that this website only works in IPv6 only, so in order to avoid the confusion of the SearX users that don't have IPv6 connectivity, we prefer to remove the instance from the public list.

I'm an IPv6 advocate myself, but in this situation I prefer to keep a good user experience than keeping an instance that may not work for everyone in the "working" instances list.

If you add an IPv4 server for your domain, we surely can add back your instance to the public list.