Add permissions to a Session Configuration

Though the recommended approach would be to upgrade to PowerShell 5.1 and implement JEA (preferable with DSC and the JEA DSC module), there sometimes might be a need to programmatically add permissions to a PowerShell session configuration.

Continuing the mentioned above, and a question asked on the reddit forum, below is an example on how to add a specific permission (ACE) to the configuration session permissions (ACL):