ns_hashpath - Break path into subdirectories
Hash the leading characters of string into a path, skipping periods and slashes. If string contains less characters than levels requested, '_' characters are used as padding. For example, given the string 'foo' and the levels 2, 3: foo, 2 -> /f/o foo, 3 -> /f/o/o
string Path to be broken
levels How many subdirecotries to make
oss2:nscp 13> ns_hashpath foo 3 /f/o/o