To be able to swap out babeld for a different babel implementation in
the future, this splits all fff-specific configuration into a seperate
fff-babel package.
Implementation specific configuration is done in
/lib/functions/fff/babeldaemon, which is included with every selectable
babel implementation. It contains functions, which are called by the
fff-specific code, and therefore allows to configure the implementation
specific parts.
The babel implementation is provided by implementation-specific
fff-packages, which provide 'fff-babel-implementation'. At the moment,
only fff-babeld is supported for use as babel implementation.
Signed-off-by: Fabian Bläse <fabian@blaese.de>