controls which of the these should be printed.
"
-option "no-user-summary" -
-#~~~~~~~~~~~~~~~~~~~~~~~~~~~
-"do not print the user summary table"
-flag off
-dependon="select"
-
-
-option "user-summary-sort" -
-#~~~~~~~~~~~~~~~~~~~~~~~~~~~
-"how to sort the user-summary"
-enum typestr="col_spec"
-values="name","uid","dir_count","file_count","size"
-default="size"
-optional
-dependon="select"
-details="
- It is enough to specify the first letter of the column specifier,
- e.g. \"--user-summary-sort f\" sorts by file count.
-"