20210926
--------

Switch from xdm to display-manager

If using a display manager, please update ${OPENRC_CONF_DIR}/conf.d/display-manager
and run the following commands:

# rc-update del xdm default
# rc-update add display-manager default

More info: https://www.gentoo.org/support/news-items/2021-01-30-display-manager-init.html
