mod_http_oauth2: Support OpenID UserInfo claims Actually filling in those details is left to another module because I don't really wanna mix in a dependency on PEP or mod_vcard here, those implementation details can be in a second module. Some might want to fill this from LDAP or something as well.

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",
}
```