+#if overwrite existing cfg files
+$config_files = '-o Dpkg::Options::="--force-confnew"'
+#elsif force use of old files
+$config_files = '-o Dpkg::Options::="--force-confold"'
+#elsif update only unchanged files
+$config_files = '-o Dpkg::Options::="--force-confdef"'
+#else
+$config_files = ''
+
+#if install missing configuration files for the package
+$config_missing = '-o Dpkg::Options::="--force-confmiss"'
+#else
+$config_missing = ''