Saving path into 'path' variable in settings. It was creating issues at install/upgrade + fixing a bug in path in upgrade.

scripts/backup

@@ -64,4 +64,4 @@ ynh_backup "/etc/logrotate.d/$app"
 #=================================================
 
 ynh_backup "/etc/uwsgi/apps-available/$app.ini"
-ynh_backup "/etc/systemd/system/uwsgi-app@.service"
+ynh_backup "/etc/systemd/system/uwsgi-app@.service"

scripts/install

@@ -47,7 +47,7 @@ ynh_webpath_register "$app" "$domain" "$path_url"
 #=================================================
 
 ynh_app_setting_set "$app" domain "$domain"
-ynh_app_setting_set "$app" path_url "$path_url"
+ynh_app_setting_set "$app" path "$path_url"
 ynh_app_setting_set "$app" final_path "$final_path"
 
 #=================================================

scripts/upgrade

@@ -24,7 +24,7 @@ app=$YNH_APP_INSTANCE_NAME
 
 # Retrieve arguments
 domain=$(ynh_app_setting_get "$app" domain)
-path_url=$(ynh_app_setting_get "$app" path_url)
+path_url=$(ynh_app_setting_get "$app" path)
 db_name=$(ynh_app_setting_get "$app" db_name)
 db_pwd=$(ynh_app_setting_get "$app" mysqlpwd)
 db_user=$app
@@ -50,7 +50,7 @@ fi
 # If path_url doesn't exist, create it
 if [ -z "$path_url" ]; then
 	path_url=$(ynh_app_setting_get "$app" path)
-	ynh_app_setting_set "$app" path_url "$final_path"
+	ynh_app_setting_set "$app" path "$path_url"
 	ynh_app_setting_delete "$app" path
 fi