Correct way to install preprocessed man pages

[Jake Smith]

Hi all,

I am putting a new port together, but the source for the man pages is 
not provided in the source tar for the package (and I can't find a 
public repo). Instead only the "preprocessed" version is included.

What is the correct way to install these man pages? Using INSTALL_MAN 
to drop them in man/manX obviously causes formatting oddities, so should 
they go in man/catX? I can see some other ports do this, but it seems a 
bit hacky as the MAN[1-9] variables cannot be used and the man pages 
will have to be listed in pkg_plist.

Any advice on this would be greatly appreciated!

Jake