Hello,

some of the possible `\resizebox` usages don't map to corresponding
l3box functions.

In particular, I am looking for

  \resizebox{<h-size>}{<v-size>}

and 

  \resizebox{!}{<v-size>}

The first one resizes width and height of the original box to the provided
<h-size> and <v-size> values and the second one only the height, while
maintaining the original aspect ratio of the box content.

The existing \box_resize:Nnn resizes width and totalheight, but I am
looking for resizing width and height.

There is a \box_resize_to_ht_plus_dp:Nn, but \box_resize_to_ht:Nn is
missing.

Could they be provided in a future l3box version?

Thanks and kind regards,
Alexander