Option to show copyright status of the logs themselves

[mgedmin]

Svetlana A. Tkachenko requested this via email:

Would you please write a piece of code to ask people who use your software to specify the licence they would like to release the irc logs under? Otherwise it is an implied 'all rights reserved' which is bad. I am sure many of them are copyleft resources (allowing redistribution and modification of the logs) but forget to specify that.

I think the best solution would be to have a proper configuration file where I could specify arbitrary footer text.