Comment 40 for bug 174672

I've added a proposed workflow which can be implemented easily. Not that retrieving the list of URLs can be done dynamically and as a fall back should get the list out of a configuration file that is shipped with the application. The result of downloading the list of URLs should be stored in the shipped config file that will be upgraded in this way.

In this way, it is possible to add more than one holiday calendar as to the earlier proposition. I hope this proposed workflow will spark implementing and fixing of this issue.