syscall separation part 7

[David P. Reese, Jr.]

Rename do_dup() to kern_dup() and pull in some changes from FreeBSD-CURRENT.
Implement dup(), dup2() and fcntl(F_DUPFD) with kern_dup().

Split fcntl() into fcntl() and kern_fcntl().

Implement linux_fcntl() using kern_fcntl() and replace a call to fcntl()
in linux_accept() with a call to kern_fcntl().

http://gomerbud.com/daver/patches/dragonfly/syscall-separation-7.diff

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