Pull up following revision(s) (requested by rmind in ticket #678):
sys/rump/librump/rumpkern/rump.c: revision 1.243
sys/rump/librump/rumpkern/rump.c: revision 1.244
sys/rump/librump/rumpkern/rump.c: revision 1.245
sys/rump/librump/rumpkern/rump.c: revision 1.246
usr.sbin/npf/npftest/npftest.c: revision 1.5
usr.sbin/npf/npftest/README: revision 1.2
usr.sbin/npf/npftest/npftest.h: revision 1.5
sys/rump/net/Makefile.rumpnetcomp: revision 1.5
sys/rump/net/lib/libnpf/shlib_version: revision 1.1
sys/net/npf/npf_impl.h: revision 1.22
sys/rump/dev/lib/libnpf/Makefile: file removal
usr.sbin/npf/npftest/Makefile: revision 1.3
sys/rump/dev/lib/libnpf/component.c: file removal
sys/rump/dev/lib/libnpf/shlib_version: file removal
sys/net/npf/npf_state.c: revision 1.12
sys/rump/net/lib/libnpf/component.c: revision 1.1
usr.sbin/npf/npftest/libnpftest/npf_test_subr.c: revision 1.4
usr.sbin/npf/npftest/libnpftest/npf_test.h: revision 1.6
sys/rump/net/lib/libnpf/Makefile: revision 1.1
Move and rename librumpdev_npf to librumpnet_npf.
Enable the build of librumpnet_npf.
Add npf_state_setsampler() for _NPF_TESTING case.  This also fixes the build.
Call pserialize_init() during rump start-up, since librump/net/npf
uses it.
It helps to include the declaration of the routine being called.
We also need kcpuset_init() now.
Use correct routine name - kcpuset_sysinit() vs kcpuset_init()

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