mod_http_oauth2: Focus username field automatically Reduces effort, not having to click or tab to focus the username field. Should have no negative effects since there's no other elements one might want to focus.

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",
}
```