paperconf prints information about a given paper. The information that
can be obtained is the name of the paper, its size and its width or height.
When called without arguments, paperconf prints the name of the system-
or user-specified paper, obtained by looking in order at the PAPERSIZE
environment variable, at the contents of the file specified by the
PAPERCONF environment variable, at the contents of
/etc/papersize or by using letter as a fall-back value if none
of the other alternatives are successful. By default, width and height of the
paper are printed in PostScript points.