How to deactivate embedding images in html file 4.2

As I save for my homepage a html file, the pictures are in 4.2 embedded - new feature in 4.2 for merge mail with images (https://wiki.documentfoundation.org/ReleaseNotes/4.2/de) . But I don’t want to merge, as it is a simple index.html file which I save and the images are linked.
How can I deactivate embedding images saving in html in 4.2 ?

It does not appear to have been an optional change according to the commit and notes in fdo#63211. I have made a note of it in fdo#48887, which is now adversely impacted. Previously it was possible to use:

  • File > Export… > select File Type of “XHTML” to embed the graphic.
  • File > Save As… > select File Type of “HTML Document” to link the graphic.

… regardless of whether the source file was an ODT or HTML with embedded or linked graphic. Now, all options result in a base64 embedded graphic. Feel free to comment in fdo#48887 as this would seem undesirable.