* Make pagespecs match relative by default? (see [[discussion]])
* Flip wikilinks? (see [[todo/link_plugin_perhaps_too_general?]])
* YADA format setup files per default?
+* Enable tagbase by default (so that tag autocreation will work by default).
+ Note that this is already done for wikis created by `auto-blog.setup`.
+* [[tips/html5]] on by default (some day..)
In general, we try to use [[ikiwiki-transition]] or forced rebuilds on
upgrade to deal with changes that break compatability. Some things that