Topic: User repo and unsigned packages option mod
Using trusted unsigned packages possibly in the LAN is made possible by a $repo_sign flag placed in the config.php
Hosting one's own package repo is available in FA. The $repo_auth array in version.php can be overridden by one in the config.php file.
$SysPrefs array is not used in the includes/package.inc file (in FA 2.4) but the config variables are used from their global context.
Commits in my repos:
FA 2.4 commit as of today (Oct 2017).
FA 2.3 commit as of 2014.