mod_muc_cloud_notify: Count codepoints instead of bytes Still marked as a 'TODO' in XEP-0372, but Converse.js is counting codepoints, and rough consensus is that this is the easiest approach in the widest range of environments.

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

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