mesa-17.0.0-3 can now be installed side-by-side with
nvidia-378.13 driver without any libgl/libglx hacks, and with the help of Fedora and upstream xorg-server patches.
First step was to remove the libglx symlinks with xorg-server-1.19.1-3 and associated mesa/nvidia drivers through the removal of various libgl packages. It was a tough moment because it was breaking optimus system,
xorg-serverconfiguration needs manual updating.
The second step is now here, with an updated 10-nvidia-drm-outputclass.conf file that should help to have an "out-of-the-box" working
xorg-serverexperience with optimus system.