Revert back before !62

Spice is an open-souce project, developed in a collaborative public manner for more than 10 years.

The patches from !62 (closed) were pushed without review and proper discussion.

See also "About decisions and reviews" thread: https://lists.freedesktop.org/archives/spice-devel/2020-May/051621.html

To make this even more clear, I posted a "Project governance" doc for spice-space.org based on libvirt's. See spice-space-pages!18

(the revert was done with git read-tree -um @ 9513620f99bbb6444614cd2ed7dc42f79f0d35cf + cherry-pick 15b1e2a3)