I'm using NFS to share files between etch machines, and I want to map specific client users to specific server users. I'm reading some stuff that says that the "map_static" option of /etc/exports is what I want, but the man page for this file does not mention this option. In fact, this option is not recognized when I add it to /etc/exports and run "exportfs -r". What am I missing? Is there another way to do what I want?