strtodg.c in gdtoa.c: fix a glitch, introduced 20160506, with some
strtoIg.c in gdtoa.c: undo some changes, probably of 20160506, that
caused trouble with subnormal values, such as 1.23e-320, on which
values differing by one in the least-significant bit.
test/dt.c: when compiled with -DUSE_fpinit, initially invoke
fpinit_ASL() (found in the AMPL/solver interface library) to set Intel
test/dtest.c: change output to say "strtord consumes" rather than
test/d.out: update to reflect the above change to dtest.c.