vm_map.9: Update to match the struct layout in sys/vm/vm_map.h

[eadler]

Summary

The manpage of vm_map.9 currently does not match with the
struct layout in sys/vm/vm_map.h . Thus upgrade the manpage
accordingly.

[kib]

This is wrong, it exposes an implementation detail which is really not relevant when _KBI wrappers are used.

These two lines should be removed, and vm_map_min(9)/vm_map_max(9) documented instead.

[khng]

In D16105#341436, @kib wrote:

This is wrong, it exposes an implementation detail which is really not relevant when _KBI wrappers are used.

These two lines should be removed, and vm_map_min(9)/vm_map_max(9) documented instead.

vm_map_min(9) and vm_map_max(9) are already documented, so removing these two lines should be better.

[khng]

Now remove the two affected lines as they are implementation-specific. Instead
one should read vm_map_min.9 and vm_map_max.9.

[eadler]

closed in r337236