netbsd.org->NetBSD.org

Modify the i387 code so that it can be shared between the i386 port
and the x86_64 port. XXX some files should be distinct.

Id -> NetBSD

Winning Strategies has placed this code into the Public Domain

Added RCS ID's. ID's use new RCSID macro from <machine/asm.h>.

FPU specific math code.