fix tester

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
tester

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
lib/signals: improve documentation

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>