/usr/share/doc/libcouchdb-glib-dev/README.gz is in libcouchdb-glib-dev 0.7.4-0ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libcouchdb-glib-dev/../libcouchdb-glib-1.0-2/README.gz