/usr/share/gtk-doc/html/rsvg-2.0 is in librsvg2-doc 2.40.5-1+deb8u2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/gtk-doc/html/../../doc/librsvg2-dev/html
/usr/share/gtk-doc/html/../../doc/librsvg2-dev/html