flashrd binary images

The kernel is built on OpenBSD 4.8, plus several pullups from current. Some of these are needed just to boot flashrd with OpenBSD 4.8 on amd64 due to GCC4 store re-ordering "optimization"! And they help reliability on both i386 and amd64 for various drivers (also due to GCC4 store optimization).

• Fix a 16 year old bug in the sorting routine for non-contiguous netmasks.
  sys/net/radix.c 1.28
• Support 82583V, Quad 82575
  sys/dev/pci/if_em.c 1.248 [with 1.246 backed out, it is not applicable under 4.8]
  sys/dev/pci/if_em_hw.c 1.58
  sys/dev/pci/if_em_hw.h 1.46
• Support SiS191, bus_dmamap_sync additions
  sys/dev/pci/if_se.c 1.6
  sys/dev/pci/if_sereg.h 1.4
• bus_dmamap_sync() freshly initialized Rx descriptors before flipping the bit that hands them over to the hardware
  sys/dev/pci/if_vr.c 1.106
• Make sure bus_dmamap_sync() always involves a function call, to prevent the compiler from doing stupid things like reordering stores around it.
  sys/arch/i386/eisa/eisa_machdep.c 1.14
  sys/arch/i386/i386/bus_dma.c 1.22
  sys/arch/i386/include/bus.h 1.53
  sys/arch/i386/pci/pci_machdep.c 1.54
  sys/arch/amd64/amd64/bus_dma.c 1.33
  sys/arch/amd64/include/bus.h 1.24
  sys/arch/amd64/pci/pci_machdep.c 1.36
• Stop sending so many superfluous IPIs (amd64)
  sys/arch/amd64/include/pmap.h 1.34
  sys/arch/amd64/amd64/pmap.c 1.56
• Stop trusting the devices and instead require drivers to explicitly pass the BUS_SPACE_MAP_PREFECTHABLE flag to pci_mapreg_map().
  sys/dev/pci/pci_map.c 1.28
• Fix an uninitialized value leading to bogus KASSERT in uvm_pmr_use_inc().
  sys/uvm/uvm_pmemrange.c 1.17
• Add "memory" clobber to lidt inline asm, to prevent the GCC optimizer from getting stupid ideas like optimizing away stores to the descriptor that we're setting.
  sys/arch/i386/include/cpufunc.h 1.17
  sys/arch/amd64/include/cpufunc.h 1.5