only copy a few locales -> rootfs is one tenth of the size (50MB instead of 500MB)
add cmdoptsgroup to all tasks that need it and most other tasks as well, so we can use the same options for all of them

I would like to add it to check_submodules, but that causes an error.
fix bug in pavement.py: /etc/rc.d was empty because of a missing "return" statement