Mountd strikes again! The BSD mount command sends a HUP to mountd every
time it successfully mounts a filesystem. Since we mount about 80 gazillion filesystems in jails and these mounts are overlapped with other parts of the setup process, it is quite likely that some jail's innocent use of /usr/bin/foo is going to be blown out of the water by a random senseless HUP. Grisly hack: when setting up jails, rename mountd.pid so mount can't find it. Hah! hup THIS mount!