libcap-ng-0.9.4

• Add bluetooth collection to netcap --advanced
• Don't drop netcap --advanced if only VSOCK kernel headers are missing
• In cap-audit, verify executable is being passed
• Add a systemd simulator to cap-audit: use --service to test a service file
• Improve cap-audit recommendations by correlating syscall outcomes
• Allow supplying vmlinux.h for reproducible cap-audit builds
• Restore --with-python/--without-python as generic Python configure options
• Fix on-demand bash completion loading for the utilities