Make Jacobian types offered by dlsode.f accessible by lsode (bug #31626). * liboctave/numeric/LSODE-opts.in: Add options "jacobian type", "lower jacobian subdiagonals", and "upper jacobian subdiagonals". * liboctave/numeric/LSODE.cc (file scope, lsode_j, LSODE::do_integrate (double)): Handle new configurable Jacobian types. * build-aux/mk-opts.pl: Don't implicitly convert to integer in condition.

%!test <*52851>
%! script1
%! assert (r11, 1);
%! assert (r21, 2);
%! assert (r22, 2);

%!test <*52851>
%! script2
%! assert (r1, 1);
%! assert (r2, 2);

%!test <*52851>
%! flag = true;
%! script3
%! assert (r, 1);
%! flag = false;
%! script3
%! assert (r, 2);

%!test <*52851>
%! script4
%! assert (r1, 1);
%! assert (r2, 2);