Symbolic links to the undocumented(7) manual page may be provided if no manual page is available, but that is deprecated.
The lack of a manual page is still a bug, and if at all possible you should write one yourself.
For help with writing manual pages, refer to the
Man-Page-HOWTO, the examples created
dh_make, or the
If the package provides
--help output, you might want to use
help2man utility to generate a simple manual page.