Comment 3 for bug 1808264

I have added a patch which applies both upstream merge requests linked above. I was not above to successfully set up pbuilder, but built and tested it successfully with debuild in a bionic VM. Subscribing ubuntu-sru in accordance with http://packaging.ubuntu.com/html/security-and-stable-release-updates.html as I'm pretty sure the change I'm requesting would be a stable release update.

Aiming justify that update: this is a significant regression because somewhere between Xenial and Bionic, this caldav freebusy code was rewritten and broken. Additionally somewhere in that timeframe the behavior changed from using the address book's FBURL to using this caldav-based technique (which, again, doesn't work :)