tests: Add test for LOOP underrun

Signed-off-by: Michael Buesch <m@bues.ch>
Add a way to mark SFBs/SFCs as broken

Signed-off-by: Michael Buesch <m@bues.ch>
cli: Add SFC/SFB interface printing

Signed-off-by: Michael Buesch <m@bues.ch>
tests: Add SFC/SFB interface list test

Signed-off-by: Michael Buesch <m@bues.ch>
Bump version

Signed-off-by: Michael Buesch <m@bues.ch>