+=item libravatar_default_image
+
+Default image to serve for libravatar if there is no avatar for an
+e-mail address. By default, this is a 1x1 png. [This will also be the
+image served if someone specifies avatar=no.]
+
+Default: $config{web_dir}/1x1.png
+
+=cut
+
+set_default(\%config,'libravatar_default_image',$config{web_dir}.'/1x1.png');
+
+=item libravatar_cache_dir
+
+Directory where cached libravatar images are stored
+
+Default: $config{web_dir}/libravatar/
+
+=cut
+
+set_default(\%config,'libravatar_cache_dir',$config{web_dir}.'/libravatar/');