lsfd: error if extraneous argument given

lsfd: error if extraneous argument given

The manual and help string both spec lsfd [options];
actually stick to that instead of ignoring subsequent arguments.

This is particularly a weird thing to allow given that lsof path
is legal and does something (either same as
lsfd -Q "MAJ:MIN == \"$(stat -c %Hd:%Ld path)\"" if it's a mountpoint or
lsfd -Q "NAME ~= '$path'" (sans the regex and escaping) otherwise).

This mirrors ec96a89ed9551ffacfc58b3056c8070444e3a2f3 for largely the
same reason.

Signed-off-by: Karel Zak <kzak@redhat.com>
Tested-by: Masatake YAMATO <yamato@redhat.com>