Add man page to the brew package

[pereorga]

A man page can now be generated, but is not being included when installing the package using brew:

$ brew install oxipng
Warning: oxipng 9.1.1 is already installed and up-to-date.
To reinstall 9.1.1, run:
  brew reinstall oxipng

$ man oxipng
No manual entry for oxipng

[andrews05]

Hi @pereorga, sorry to hear this but this is probably expected at this point. Oxipng maintainers don't control any of the external distributions - each of them will need to make changes to their packaging to accommodate the new man page. Try reporting this to homebrew.