o Introduce private types for use in linux syscalls for two reasons:

   1. establish type independence for ease in porting and,
   2. provide a visual queue as to which syscalls have proper
      prototypes to further cleanup the i386/alpha split.
   Linuxulator types are prefixed by 'l_'. void and char have not
   been "virtualized".

o  Provide dummy functions for all unimplemented syscalls, except for
   the osf1 syscalls. This can only be done if the osfulator
   implements at least all syscalls used by the linuxulator. Remove
   dummy functions for syscalls that are now truely unimplemented.

o  Set the syscall namespace as follows: Mark a syscall as OSF1 if
   the Linux kernel has prefixed the syscall with 'osf_' and has
   provided special implementations for it. Otherwise mark the
   syscall as LINUX by default. Some of the LINUX syscalls remain
   marked as BSD or POSIX.

o  Rename syscalls so they match the names used in the Linux kernel.
   Also, provide more accurate prototypes. This generally improves
   cross-referencing and reduces head-scratching.

o  Fix the (g|s)etresuid syscalls. They mapped to (g|s)etresgid.

o  Sanitize the the shm*, sem* and msg* syscalls. Their prototypes
   were dictated by the way these syscalls were used in the i386
   code. That has been fixed. NOTE: linux_semctl now passes it's
   'arg' parameter by value and not by reference.

o  Fix prototype of linux_utime. It takes a struct timeval, not a
   struct utimbuf.

o  Fix the linux_sysfs syscall. It's index is not 255, but 254.

o  Implement the following syscalls:
     linux_sysctl

o  Add the following new syscalls:
     (g|s)etresgid
     linux_pivot_root (dummy)
     linux_mincore (dummy)
     linux_pciconfig_iobase (dummy)
     linux_getdents64

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