add news item for ikiwiki 1.29

doc/news/version_1.26.mdwn

@@ -1,6 +0,0 @@
-ikiwiki 1.26 released with these changes:
-
-   * Add a missing -n to tla undo call.
-   * otl2hmtl can't be safely used with IPC::Open2 since it sometimes
-     writes before consuming its whole stdin. Avoid this deadlock.
-   * Fix alt tags for outline checkboxes.

doc/news/version_1.29.mdwn

@@ -0,0 +1,27 @@
+ikiwiki 1.29 released with these changes:
+
+   * Patch from Paul Tötterman to use CP in the Makefile.
+   * Patch from Alec Berryman adding a http\_auth config item that allows
+     using HTTP Authentication instead of ikiwiki's built in authentication.
+     Useful for eg, large sites with their own previously existing user auth
+     setup. Closes: #[384534](http://bugs.debian.org/384534)
+   * Change %renderedfiles to store an array of files rendered from a given
+     source file, to allow tracking of extra rendered files like rss feeds.
+   * Note that plugins that accessed this variable will need to be updated!
+     The plugin interface has been increased to version 1.01 for this change.
+     As few plugins use %renderedfiles I haven't done anything else to ensure
+     compatability of old plugins.
+   * Add will\_render function to the plugin interface, used to register that a
+     page renders a destination file, and do some security checks. Previously
+     but no longer rendered files will be cleaned up.
+   * Use will\_render in the inline and linkmap plugins.
+   * You will need to rebuild your wiki on upgrade to this version.
+   * Atom feed support based on a patch by Clint Adams.
+   * Add feeds=no option to inline preprocessor directive to turn off all types
+     of feeds.
+   * $IkiWiki::version now holds the program version, and is accessible to
+     plugins.
+   * Make the aggregate plugin emphasize error messages.
+   * Patch from Recai to limit recentchanges to displaying max 10 files for a
+     given changeset (to avoid large number of file changes excessively
+     bloating the page).