Make start_server use standard config_backups instead of its own ad-hoc solution

Scripts/7D2D-Manage.bash

@@ -256,12 +256,7 @@ start_server() {
     printf "</ServerSettings>\n" >> "temp-serverconfig.xml"
   fi
 
-  local backups_dir
-  local backup_file
-  backups_dir="${server_directory}/Config-Backups"
-  backup_file="${backups_dir}/serverconfig.xml-$(date +%s)"
-  mkdir -p "${backups_dir}"
-  cp "${server_config}" "${backup_file}"
+  backup_configs "${server_directory}"
   mv "temp-serverconfig.xml" "${server_config}"
 
   log "info" "Starting $(important "${server_name}") located at $(important "${server_directory}") on port $(important "${server_port}")"