mod_s2s_auth_dane: Disable now redundant validation done in trunk Outgoing connections can now be validated natively in trunk since a38f9e09ca31 so we only need to check incoming connections.

This module blocks configured queries that change server state.

E.g. to make vCard storage read-only:

``` lua
readonly_stores = {
	vcard = { "vcard-temp", "vCard" };
}
```