/usr/share/man/man3/wl_client_get_display.3.gz is in libwayland-dev 1.4.0-1ubuntu1.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/wl_client.3.gz
/usr/share/man/man3/wl_client.3.gz