Compute PBS retention depth

docs/en/rapport-pdf.md

@@ -216,7 +216,7 @@ Collection reads PBS prune jobs through `/config/prune` and displays:
 - schedule;
 - active/inactive state;
 - columns `Last`, `Hourly`, `Daily`, `Weekly`, `Monthly`, `Yearly`;
-- `max-depth`.
+- computed depth, corresponding to the sum of configured `keep-last`, `keep-hourly`, `keep-daily`, `keep-weekly`, `keep-monthly` and `keep-yearly` values.
 
 A namespace missing in PBS is displayed as `/`, meaning the root namespace.
 

docs/fr/rapport-pdf.md

@@ -216,7 +216,7 @@ La collecte lit les prune jobs PBS via `/config/prune` et affiche :
 - planification ;
 - etat actif/inactif ;
 - colonnes `Derniere`, `Horaire`, `Jour`, `Semaine`, `Mois`, `Annee` ;
-- profondeur `max-depth`.
+- profondeur calculee, correspondant a la somme des valeurs `keep-last`, `keep-hourly`, `keep-daily`, `keep-weekly`, `keep-monthly` et `keep-yearly` renseignees.
 
 Une namespace absente dans PBS est affichee comme `/`, c'est-a-dire la namespace racine.