syscall separation part 15 for review

["David P. Reese, Jr." <daver@xxxxxxxxxxxx>]

Split mmap().

Move ovadvise(), ogetpagesize() and ommap() to new file 43bsd/43bsd_vm.c.

http://gomerbud.com/daver/patches/dragonfly/syscall-separation-15.diff

-- 
   David P. Reese, Jr.                                     daver@xxxxxxxxxxxx
                                               http://www.gomerbud.com/daver/