Pull up following revision(s) (requested by christos in ticket #696):

sys/arch/amd64/amd64/vector.S: revision 1.62 (patch)
sys/arch/x86/include/intr.h: revision 1.55
sys/arch/i386/i386/vector.S: revision 1.77
sys/arch/i386/i386/db_interface.c: revision 1.82 (patch)
sys/arch/amd64/amd64/spl.S: revision 1.34 (patch)
sys/arch/amd64/amd64/db_interface.c: revision 1.33 (patch)
sys/arch/x86/x86/intr.c: revision 1.125
sys/arch/i386/i386/spl.S: revision 1.43 (patch)
sys/arch/i386/i386/machdep.c: revision 1.805 (patch)
sys/arch/x86/x86/lapic.c: revision 1.66 (patch)

Rename the DDB IPI IDT vectors for consistency. ok maxv@

Rename Xpreempt{recurse,resume} -> X{recurse,resume}_preempt so that
they fit the pattern. Also the debugger trap sniffer matches them
without adding special entries...

XXX: pullup-8.

(martin)