"VIRTUAL NAME" "ABSOLUTE PATH NAME" "FLAGS"
The virtual names are _not_ case sensitive. All 26+10 alpha-numeric charactors are valid as well as the following: - _ . , and the space charactor.
Valid flags are ALL, which means that files in the directory can be read and looked up, LOOKUP, which means only names can be viewed. RECURSE means that directories under the one specified are viewable under the current permissions specified. Flags can be combined together with spaces. This mainly applies to the permession flags and the flag to specify recursion.