- added HUGE_VALF, HUGE_VALL, INFINITY, FP_INFINITE, FP_NAN,

- added HUGE_VALF, HUGE_VALL, INFINITY, FP_INFINITE, FP_NAN,
FP_NORMAL, FP_SUBNORMAL, FP_ZERO, FP_ILOGB0, FP_ILOGBNAN definitions,
per C99
- classify functions into sections, add missing definitions, add
and some '#if 0' functions, and long double definitions, so we see
what's needed to be done
- other stuff is XXX'd, and will be uncommented soon
ok millert@