fully flexible config override with variables

[eleaner]

I see you are very selective in defining as to which config parameters are to be modified through ENV variables.

I wonder why wouldn't you go with something like:

configs=${!<respective config file>*}
for var in $configs; do
    config_name=${var#*_}
    echo "${config_name} = ${!var}" >> /etc/mfs/<respecitve config file>.cfg
done

then e.g. ENV

mfschunkserver_WORKING_GROUP = mfs

would set
WORKING_GROUP = mfs
in /etc/mfs/mfschunkserver.cfg

(I am aware that the capital letters have to be addressed - I am only not sure how)