+
+" Save 'runtimepath' in case it was changed by the system's configuration
+" files.
+if has('eval')
+ let s:save_runtimepath = &runtimepath
+endif
+" Reset all options (except 'term, 'lines' and 'columns'). This makes sure a
+" system wide configuration file doesn't change default values.
+set all&
+" And restore it after all other options were reset.
+if has('eval')
+ let &runtimepath = s:save_runtimepath
+endif
+