Use some F macros in logging example.
Use some F macros in logging example.

cburstedde/libsc,cburstedde/libsc,johannrudi/libsc,holke/libsc,johannrudi/libsc,cburstedde/libsc,cburstedde/libsc,johannrudi/libsc,holke/libsc,johannrudi/libsc,johannrudi/libsc,holke/libsc,cburstedde/libsc,holke/libsc