+* --changesetup setupfile
+
+ Reads the setup file, adds any configuration changes specified by other
+ options, and writes the new configuration back to the setup file. Also
+ updates any configured wrappers. In this mode, the wiki is not fully
+ rebuilt, unless you also add --rebuild.
+
+ Example, to enable some plugins:
+
+ ikiwiki --changesetup ~/ikiwiki.setup --plugin goodstuff --plugin calendar
+