Include init scripts in packages

The distribution specific init scripts where excluded from the
packaging when it was reworked.  The intention is to replace
them with systemd equivilants.  However, that work has not yet
been done and the init scripts are still useful so they have
been added back in to the packaging.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

rpm/generic/zfs.spec.in

@@ -131,8 +131,7 @@ find %{?buildroot}%{_libdir} -name '*.la' -exec rm -f {} \;
 %{_udevdir}/zvol_id
 %{_udevdir}/rules.d/*
 %config(noreplace) %{_sysconfdir}/%{name}
-# Systemd integration is still required.
-%exclude %{_sysconfdir}/init.d/*
+%{_sysconfdir}/init.d/*
 
 %files devel
 %{_libdir}/*.so