Read multiple variables

src/freedombone-utils-selector

 
     var_name=${app_name}_variables
     if [ ! ${!var_name} ]; then
+        echo $"${app_name}_variables was not found"
         return
     fi
 
-    varname=${!var_name}
-    for v in "${var_name[@]}"
+    eval "varname=(\${$var_name[@]})"
+    for v in "${varname[@]}"
     do
         read_config_param $v
     done
         return
     fi
 
-    varname=${!var_name}
+    eval "varname=(\${$var_name[@]})"
     for v in "${varname[@]}"
     do
         write_config_param $v "${!v}"