Run in foreground in debug mode

Signed-off-by: Christophe Vu-Brugier <cvubrugier@yahoo.fr>
Add the "array_size" module from CCAN

Signed-off-by: Christophe Vu-Brugier <cvubrugier@yahoo.fr>
Improve log messages in isns.c

Signed-off-by: Christophe Vu-Brugier <cvubrugier@yahoo.fr>