Tcpdump did not show the OSPF router id of hello packets if it was
equal to the source ip address.  This is confusing and inconsistent
with IPv6.  So always print the rtrid.
OK stsp@
Create the ioport_ex and iomem_ex extents after we've set up the gdt gates
such that curcpu() works.  The extent code creates pools, and if we want to
add any sort of locking to the pool code we need that working.  Found out the
hard way by guenther@.

ok dlg@, guenther@