iRule to detect the URI for the hangup process.

This is one of those URIs that APM hides. It can be accessed by disabling restrict_irule_events:

when CLIENT_ACCEPTED {
    ACCESS::restrict_irule_events disable 
}
when HTTP_REQUEST {
    if { [HTTP::path] starts_with "/vdesk/hangup.php3" } {
        log local0. "Detected logout process trigger"
    }
}