Hi!

Attached is a fixed version of nextafterl and fpclassifyl fixes Steven
sent privately a few days ago, together with a couple of fixes on top
of that from me.

I have used attached tester to test whether nextafterl works correctly,
not sure if we want that in glibc testsuite (only tested on ppc/ppc64
as it is ldbl-128ibm specific) or not, perhaps with smaller number of
tests.  The 10 million iterations take ~ 70 seconds on my G5.

	Jakub