mod_http_oauth2: Validate (unused at this point) localized URIs Client registration may include keys of the form "some_uri#lang-code" pointing to alternate language versions of the various URIs. We don't use this yet but the same validation should apply.

This module lets you block connections to remote servers at the s2s
level.

``` {.lua}
modules_enabled = {
    -- other modules --
    "s2s_blacklist",

}
s2s_blacklist = {
    "proxy.eu.jabber.org",
}
```