The first time I emerged baselayout, udev, & openrc my etc/conf.d/net disappeared. When I ran dispatch-conf there were no messages re: etc/conf.d/net. Very aggravating as I had no backup. I thought CONFIG_PROTECT was supposed to prevent this sort of thing. In subsequent upgrades and downgrades it didn't happen again. Possibly something related to when net was last edited?
*** This bug has been marked as a duplicate of bug 217848 ***