Fix three bugs identified in live USB diagnostics (COLIBRI-XFCE-HANDOFF-04.JUN.2026):
1. procname collision: 'colibri-daemon' instead of '/usr/sbin/daemon'
so service status finds OUR process, not tailscaled or any other
daemon(8)-managed service.
2. pidfile flag: -p (child pidfile) instead of -P (supervisor pidfile)
so the pidfile holds the colibri-daemon PID, which rc.subr can
match against the unique procname.
3. Cascading bypass: fixing procname prevents rc.subr from skipping
daemon(8) entirely. Process tree should now be:
rc.d → daemon(8) → colibri-daemon (with crash restart)
