bug#36729: 27.0.50; Unclear total in directory listing

[Mattias Engdegård]

The first line of a directory listing reads

  total used in directory 71752 available 65.2 GiB

where it is a mystery what the first number represents. Often it is 512-byte 
blocks, which is confusing and not very useful, and cannot easily be compared 
with the 'available' number (which is crystal clear).

It has always been thus, but previously the 'available' number was itself 
somewhat obscure so the first number didn't stand out.