Docs fail to build

[WhyNotHugo]

sphinxcontrib.newsfeed fails: https://app.readthedocs.org/projects/khal/builds/31468594/

Last commit was 7 years ago. Looks like it doesn't work with latest Sphinx.

[qweered]

Yeah sphinxcontrib.newsfeed is unmaintained, we probably should drop it from dependencies

[WhyNotHugo]

Yeah, the issue is that we'd break the RSS feed, which might be used downstream.

[WhyNotHugo]

Maybe we can use https://pypi.org/project/sphinxfeed-lsaffre/ ?

[WhyNotHugo]

The published docs point to https://lostpackets.de/index.rss, but the real feed is in https://lostpackets.de/khal/index.rss.

Apparently, last updated in 2019.