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 lets you block connections to any remote servers not on a
whitelist.

``` {.lua}
modules_enabled = {
    -- other modules --
    "s2s_whitelist",

}
s2s_whitelist = {
    "example.org",
}
```