Currently the man pages for squashfs-tools are based on man pages used from Debian. Upstream doesn't provide man pages as part of the project, but the executables provide reasonably detailed help output. So using help2man may provide a more maintainable way to provide man pages. I probably won't do this until the next squashfs-tools release. Phillip has been doing a lot of clean up work the last few months and I expect it won't be too long before there is another release. One of the changes affects implementing this change. The location of the output of the help option is being changed from stderr to stdout. Potentially I might play with this before a release so that I can make a new Fedora release sooner after the upstream release. Some of the options have changed, so something will need to be done with the current man pages as part of the Fedora update in any case.
4.5 is out now and the man pages are significantly behind. Early tests of help2man didn't look very good. I doubt a hands off build chain will work.
Phillip has announced that he will add man pages for the next point release which should be out shortly.
Upstream man pages now replace the out of date ones we got from Debian for mksquashfs and unsquashfs. There are different semantics for those programs when they are run as sqfstar or sqfscat, but we don't have man pages for those now. I don't know if thise will be provided for 4.5.1 or if that is something farther in the future. But that is outside the scope of this bugzilla entry.