Thanks Cardinal, but my attempt to update packages was not because of the security issues: that machine is airgapped in a pretty hard to reach room. I am trying to install plasma+wayland (via elogind) and I have found a report of success using xorg-server >=1.19.1. I have no idea which lib from xorg is needed to get plasma5 running on wayland but ... that's the story. I am trying to avoid bare src injecting to keep the ego/emerge distro consistent.
I already manually installed a local overlay before using layman and the result is the same:
!!! Repository name or alias 'gentoo', defined for repository 'core-kit', overrides existing alias or repository.
Don't get me wrong, I feel pretty comfortable with Funtoo. I'm an old Gentoo user (I gave up around 2003 because I couldn't afford to build my software and went back on Funtoo around year 2013). I already made my choice.
I beg your pardon for whineing a bit: I just got confused with late mods to portage system... I am not sure yet whether they are bugs or features. Crossing the fingers until our benevolent dictator complete this hell of transition. There are spurious outputs everywhere; as soon as I finish to setup my new infrastructure I'll spend some time for helping sorting out the leftovers.
At this point this thread is over:
1) my repo is not screwed.
2) emerge behavior is consistend.
3) actual xorg-server package is patched.
The only thing I didn't get yet is that "gentoo" overriding an existing alias or repository; but it works. It just spits that message out.