Update the way that the server handles the VLV request control to be more
forgiving with target ranges that are out of the bounds of the actual result
set.  Negative target offsets will still result in errors, but a target offset
of zero will be treated as if it were one.  If beforeCount is greater than or
equal to the target offset, then it will now be truncated.  If the target
offset or assertion value is beyond the end of the result set, then only the
before count entries will be returned and the target position will be set to
one greater than the content count.

OpenDS Issue Number:  1907