Replace lrint(3), lrintf(3), llrint(3) and llrintf(3) implementations with
the same implementation that we're already using for lrintl(3) and llrintl(3).
The old implementations were derived from cod

Replace lrint(3), lrintf(3), llrint(3) and llrintf(3) implementations with
the same implementation that we're already using for lrintl(3) and llrintl(3).
The old implementations were derived from code from NetBSD that didn't pass
the lib/libm/msun/lrint_test regress test. NetBSD replaced their
implementation with the FreeBSD implementation of this code which we were
already using for lrintl(3) and llrintl(3). This fixes the regress test.

ok bluhm@, millert@

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Remove FBSDID.

ok deraadt@

Remove excessive sys/cdefs.h inclusion
ok guenther millert kettenis

Finalize work on the math library. It's time to do this monster
commit, and deal with problems (if any) in tree.

Note that this adds the following functions. Ports with hacks might
need adjustment

Finalize work on the math library. It's time to do this monster
commit, and deal with problems (if any) in tree.

Note that this adds the following functions. Ports with hacks might
need adjustments.

nexttoward(3), fma(3), nexttowardf(3), fmaf(3), acoshl(3), asinhl(3),
atanhl(3), coshl(3), sinhl(3), tanhl(3), expl(3), expm1l(3), logl(3),
log10l(3), log1pl(3), log2l(3), modfl(3), cbrtl(3), hypotl(3),
powl(3), erfl(3), erfcl(3), lgammal(3), tgammal(3), ceill(3),
floorl(3), lrintl(3), llrintl(3), roundl(3), lroundl(3), llroundl(3),
truncl(3), fmodl(3), remainderl(3), remquol(3), nextafterl(3),
nexttowardl(3), fmal(3).

With this commit, our library implements all functionality required
by C99. Documentation bits will follow.

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