Subject really says it all. The module just won't work/load, unless you
move/copy it manually under /lib64/security.

Also, it would probably be a good idea to add pam.conf from the
tarball as a doc file. There's no other documentation anywhere else
in the world (or, at least, the world according to Google) that
explains how to set the module up. And this is a module that is not
easy to set up, even for people that are kinda familiar with pam
configuration files. Unless they're PAM experts, I doubt average
users know about control parameters in square brackets.

There should be support in authconfig, but that's the subject of
another report.