Fixes ZSTAC-4340; Fixes ZSTAC-4794;
Fixes ZSTAC-4340; Fixes ZSTAC-4794;

Do not prompt option -F when -F is already used

zstackio/zstack-utility,zstackorg/zstack-utility,zstackio/zstack-utility,zstackorg/zstack-utility,zstackorg/zstack-utility,zstackio/zstack-utility,live4thee/zstack-utility,live4thee/zstack-utility,live4thee/zstack-utility