Small wcfs/internal fixes
Hello @kirr,
here are small fixes for wcfs/internal.
Please see the commit messages for more information.
These fixes have been worked on in order to progress with https://lab.nexedi.com/nexedi/slapos/-/merge_requests/1815.
They are not really related to python3.11, but popped up there since we then also generally updated 'wendelin.core'.
Best, Levin