Longer variable names

src/freedombone-utils-selector

 function app_load_variables {
     app_name=$1
 
-    var_name=${app_name}_variables
-    if [ ! ${!var_name} ]; then
+    config_var_name=${app_name}_variables
+    if [ ! ${!config_var_name} ]; then
         echo $"${app_name}_variables was not found"
         return
     fi
 
-    eval "varname=(\${$var_name[@]})"
-    for v in "${varname[@]}"
+    eval "configvarname=(\${$config_var_name[@]})"
+    for v in "${configvarname[@]}"
     do
         read_config_param $v
     done
 function app_save_variables {
     app_name=$1
 
-    var_name=${app_name}_variables
-    if [ ! ${!var_name} ]; then
+    config_var_name=${app_name}_variables
+    if [ ! ${!config_var_name} ]; then
         return
     fi
 
-    eval "varname=(\${$var_name[@]})"
-    for v in "${varname[@]}"
+    eval "configvarname=(\${$config_var_name[@]})"
+    for v in "${configvarname[@]}"
     do
         write_config_param $v "${!v}"
     done