reportbug/debbugs.py, reportbug/utils.py: report if filesystem is unmerged-usr
As per TC resolution an unmerged-usr filesystem layout is unsupported starting from bookworm, so add a line in the system information if that is the case.
-- System Information:
Debian Release: bookworm/sid
APT prefers unstable
APT policy: (500, 'unstable')
merged-usr: no
Architecture: amd64 (x86_64)
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=994388#110
Edited by Luca Boccassi