* The first column specifies the short name, if any, or 0 if none.
* The second column specifies the long name.
* The third column specifies whether it takes a parameter.
- * The fourth column is the documentation.
+ * The fourth colums specifies whether is is marked as "default"
+ * if POSIXLY_CORRECT is defined: 1,
+ * if POSIXLY_CORRECT is not defined: 2.
+ * The fifth column is the documentation.
*
* N.B. The long options' order must correspond to the code in file.c,
* and OPTSTRING must be kept up-to-date with the short options.