libcfg.lib, config-getvar: option '-C|--config': accept a list of configuration files containing wilcards

Signed-off-by: Davide Madrisan <davide.madrisan@gmail.com>

ChangeLog

@@ -18,6 +18,11 @@ Changes in version 1.14.3
   * pck-update - Davide Madrisan:
     Fix a string translation by adding the missing '$' prefix.
 
++ improvement
+  * libcfg.lib, plugins/config-getvar - Davide Madrisan:
+    Option '-C|--config': accept a list of configuration files containing
+    wilcards.
+
 -------------------------------------------------------------------------------
 
 Changes in version 1.14.2

lib/libcfg.lib.in

@@ -106,7 +106,7 @@ function cfg_load_files() {
    if [ "$1" ]; then
       # select a different list of user configuration files
       cfgfile_list=(\
-`ls /etc/@package@.conf /etc/@package@.d/*.conf` $1)
+`ls /etc/@package@.conf /etc/@package@.d/*.conf $1 2>/dev/null`)
    else
       # default configuration files
       cfgfile_list=(${default_cfg_list[@]})

plugins/config-getvar.in

@@ -145,9 +145,11 @@ function config.getvar() {
    local cfg_file_lst
 
    if [ "$cfg_file" ]; then
-      [ -r $cfg_file ] ||
-         notify.error $"configuration file not found"" -- \`$cfg_file'"
-      cfg_file_lst="$cfg_file"
+      for f in $(ls $cfg_file 2>/dev/null); do
+         [ -r "$f" ] ||
+            notify.error $"configuration file not found"" -- \`$f'"
+      done
+      cfg_file_lst="$(ls $cfg_file 2>/dev/null)"
    else
       cfg_file_lst="${default_cfg_list[*]}"
    fi