Update on Slack/390

For those who have been following my posts on installing Slack/390 on Hercules:
There has been a security update this week - see the ChangeLog

I recently managed to patch a current version of SlackPkg to work on Slack/390 (the version included in /extra does not work).
I'll try to organize my notes during the following days and publish the patch so that everyone can keep Slack/390 updated with this wonderful tool :)