reorganized common repo, some minor modules improvements

modules/install_pkg.sh

@@ -28,8 +28,8 @@ install_pkg()
     if [[ -n PKGS_BLACKLIST ]]; then
         for pkg in $PKGS_BLACKLIST; do
             prnt I "Mise du paquet $pkg en liste noire..."
-            local dest=/etc/apt/preferences.d/blacklist_$pkg.conf
-            installfile blacklist.conf $dest &&
+            local dest=/etc/apt/preferences.d/blacklist_$pkg
+            installfile pkgman/blacklist.conf $dest &&
                 sed -i -e "s/@pkg@/pkg/" $dest
 
             # If blacklisted we suppose uninstall as well (if neeeded)
@@ -65,6 +65,7 @@ precheck_install_pkg()
     else
         prnt I "$(echo $PKGSEL | wc -w) paquets additionels seront installés."
     fi
+    file_exists pkgman/blacklist.conf
 }
 
 export -f install_pkg