[bug#59701] [PATCH] gnu: mailutils: Inform correct path of sendmail.

[EuAndreh]

I did try it, but it was mailutils that I feel forced my hand.  It uses 
a pre-defined list of paths to search, instead of $PATH, namely:

  /usr/sbin:/usr/lib:/etc

So I feel the opposite ocurred: I wanted it to just rely on $PATH, but 
mailutils used a specific search path, but it at least gives us a way in 
to put a custom value.