Fix the gevolution plugin.
Review Request #610 — Created April 9, 2021 and submitted
This pulls the patches from PIDGIN-15353 (Ed Catmur) and https://bugs.gentoo.org/526644 (Lars Wendler) to fix everything.
Loaded the plugin and verified that configuration worked. I don't have any good accounts to actually sync with evolution so I didn't try that part but gentoo has been carrying the patch from PIDGIN-15353 for very long time.
