!4 fix post and postun error

From: @wang_yue111
Reviewed-by: @small_leek
Signed-off-by: @small_leek

rinetd.spec

@@ -1,7 +1,7 @@
 %define with_systemd 1
 Name:                rinetd
 Version:             0.62
-Release:             1
+Release:             2
 Summary:             TCP Redirection Server
 License:             GPL-2.0-or-later
 URL:                 http://www.boutell.com/rinetd/
@@ -56,18 +56,13 @@ install -m 644 rinetd.8 %{buildroot}%_mandir/man8
 install -m 644 %SOURCE2 %{buildroot}/etc/logrotate.d/rinetd
 
 %post
-%if %{with_systemd}
-%service_add_post %{name}.service
-%else
-%{fillup_and_insserv rinetd}
-%endif
+%systemd_post %{name}.service
+
+%preun
+%systemd_preun %{name}.service
 
 %postun
-%if %{with_systemd}
-%service_del_postun %{name}.service
-%else
-%{insserv_cleanup}
-%endif
+%systemd_postun_with_restart %{name}.service
 
 %files
 %defattr(-, root, root)
@@ -84,5 +79,8 @@ install -m 644 %SOURCE2 %{buildroot}/etc/logrotate.d/rinetd
 /usr/sbin/rinetd
 
 %changelog
+* Sat 28 Aug 2021 wangyue <wangyue92@huawei.com> - 0.62-2
+- fix post and postun error
+
 * Fri May 7 2021 baizhonggui <baizhonggui@huawei.com> - 0.62-1
 - package init