mod_http_oauth2: Relax payload content type checking in revocation The code expected Content-Type: application/x-www-form-urlencoded HTTPie sent Content-Type: application/x-www-form-urlencoded; charset=utf-8 It did not work

This module blocks configured queries that change server state.

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

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