add switch param to enable 503 copying

backup_new.sh

@@ -86,6 +86,7 @@ borgPruneParams='--list'
 configDetails="$scriptPath/seafbackup.details"
 
 # 503 related
+use503=0
 err503Path="$scriptPath/503_backup.html"
 err503File="${err503Path##*/}"
 webroot="/usr/share/nginx/html"
@@ -134,7 +135,11 @@ while [ $# -gt 0 ]; do
                 badParam empty "$@"
             fi
             ;;
-        -5|--503)
+        -5|--use-503)
+            # enable copying 503 error page to webroot
+            use503=1
+            ;;
+        --503-path)
             # FULL path to 503 file
             if [ -n "$2" ]; then
                 if [ -f "$2" ]; then