mod_http_oauth2: Remove broken in-CSS templating Because util.interpolation with a "%b{}" pattern only matches the outer brackets, so variables inside them would not work unless the pattern is changed (also considered).

This module blocks configured queries that change server state.

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

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