bug#5926: feature request: mv -p to create missing target dir

[f0rhum]

>> I mean why wasn't refused "cp -p" request, saying "just use mkdir first".

> There seems to be a good deal of confusion here, as "cp -p" has nothing to do 
> with "mkdir -p".

Oooops, sorry, I meant: why wasn't refused mkdir "-p" option request, saying 
"just use ls and mkdir first"?
Hmmm, ok, I see they are both about creating dirs, but aren't mkdir, cp, mv, 
touch... all involved in creating links in a file system? Hmmm... It seems I 
triggered an endless loop in my own mind: confusion was yet there. Let's call 
this ignorance, lazziness. Mum!