so from what I can see there doesn't appear to be any 'official' way of adding new directories, updating perms and the like in baselayout.
my thought is someone who does an emerge -aveD world's system should for the most part be reset to 'factory' defaults. of course this leads to the problem... what if the 'admin' explicitly changed the permissions... Maybe we should have something like PERMS_PROTECT (similar to config_protect). where portage won't update the permissions if file/directory is protected. -- Caleb Cushing http://xenoterracide.blogspot.com
