HarfBuzz text shaping engine. It is on by default; use './configure
--without-harfbuzz' to build without it. The HarfBuzz text shaping is
available via new font backend drivers 'xfthb' and 'ftcrhb' for Xft
-and Cairo drawings, respectively.
+and Cairo drawings, respectively, and via the 'harfbuzz' backend on
+MS-Windows.
** The new configure option '--with-json' adds support for JSON using
the Jansson library. It is on by default; use './configure