MDEV-19706 RPM no longer installs init script on systemd systems, but preun script still tries to erase it

Author: vuvova

support-files/rpm/server-preun.sh

@@ -7,9 +7,9 @@ if [ $1 = 0 ] ; then
  fi
  if [ -x %{_sysconfdir}/init.d/mysql ] ; then
  %{_sysconfdir}/init.d/mysql stop > /dev/null
- fi
- if [ -x /sbin/chkconfig ] ; then
- /sbin/chkconfig --del mysql > /dev/null 2>&1
+  if [ -x /sbin/chkconfig ] ; then
+  /sbin/chkconfig --del mysql > /dev/null 2>&1
+ fi
  fi
 fi