Update to 3.20110225. From the changelog:

   * editpage: Avoid inheriting internal page types.
   * htmltidy: Avoid breaking the sidebar when websetup is running.
   * transient: New utility plugin that allows transient pages to
     be stored in .ikiwiki/transient/ (smcv)
   * aggregate: Aggregated content is stored in the transient underlay.
     (Existing aggregated content is not moved, since it will eventually
     expire and be removed) (smcv)
   * autoindex, tag: Added autoindex_commit and tag_autocreate_commit that
     can be unset to make index files and tags respectively not be committed,
     and instead be stored in the transient underlay.
     Closes: #544322 (smcv)
   * autoindex: Adapted to use add_autofile. Slight behavior changes
     in edge cases that are probably really bug fixes. (smcv)
   * recentchanges: Use transient underlay (smcv)
   * map: Avoid unnecessary ul's in maps with nested directories.
     (Giuseppe Bilotta)
   * Fix broken baseurl in cgi mode when usedirs is disabled. Bug introduced
     in 3.20101231.
   * inline: Fix link to nested inlined pages's feeds. (Giuseppe Bilotta)
   * inline: Add 'id' parameter that can be used when styling individual
     feedlinks and postforms. (Giuseppe Bilotta)


(schmonz)