Index of new symbols in 2.22

<title>H</title> <indexentry><primaryie>rsvg_handle_get_dimensions_sub, function in RsvgHandle</primaryie></indexentry> <indexentry><primaryie>rsvg_handle_get_position_sub, function in RsvgHandle</primaryie></indexentry> <indexentry><primaryie>rsvg_handle_has_sub, function in RsvgHandle</primaryie></indexentry>