+Gruntmaster::Daemon::Generator::File is a static test generator.
+If C<< $meta->{infile} >> exists, the input for test C<$i> is C<< $meta->{infile}[$i - 1] >>.
+Otherwise, the input for test C<$i> is F<< /var/lib/gruntmasterd/pb/$meta->{problem}/$test.in >>.