NO_KMEM_MAP kernel config option added (temporaty)

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>]

    I have added a NO_KMEM_MAP kernel configuration option and would
    appreciate it if people could test with it.

    This option removes kmem_map from DragonFly and adds some warning 
    printfs if memory is allocated from a FAST interrupt or IPIQ function.

    Removing kmem_map appears to be utterly trivial.  Replacing malloc()
    with the slab allocator also looks like it is going to be fairly easy,
    and replacing zalloc with the slab allocator also looks like it is 
    going to be fairly straight forward once proc, pcb, and whatever else
    depends on type-stable storage is dealt with.

						-Matt