Allow sequentially created mmap'ed anonymous regions to coalesce.  There is little or no reason to create a swap pager for small mmap's.  The vm_map_insert code will automatically create a swap pager if the object becomes too large.  This fix, per a request from phk.
Allow sequentially created mmap'ed anonymous regions to coalesce.  There
is little or no reason to create a swap pager for small mmap's.  The
vm_map_insert code will automatically create a swap pager if the object
becomes too large.  This fix, per a request from phk.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase