Sorry for keeping you waiting for quite a while. I've had a
chance to test building an RPM tonight, and this does not seem
to affect the output (the perl manpage is already installed in
/usr/share/man/man3), so I'd say this is probably safe to
apply.
For people who do private installs, the path is changed from
$prefix/man/man3/ to $prefix/share/man/man3 (where $prefix is
typically set to $HOME), but all the other manual pages are
installed in $prefix/share/man/man[1-7] anyway, so this change
cannot hurt.