did not support building urls from utf-8 strings. Closes: #579713
* htmlscrubber: Allow html5 semantic tags: section nav article aside hgroup
header footer figure figcaption time mark
- * htmlscrubber: Also allow html5 canvas tags.
+ * htmlscrubber: Also allow some other html5 tags: canvas, progress, meter,
+ ruby, rt, rp, details, summary.
* htmlscrubber: Round out html5 video support with the preload
attribute and the source tag.
* htmlscrubber: Allow the html5 form attributes: placeholder autofocus,