[MERGE] Fix bug 360791 by not raising an error when a smart server is asked for more content than it has locally; the client is assumed to be monitoring what it gets.

[Ian Clatworthy]

Robert Collins wrote:

> 1.13.0/1 will stream from unstacked branches only; in *that* case not
> getting all the content expected would be a bug; OTOH the graph search
> is how we figured out what we wanted, so a mismatch is both odd and
> unrecoverable - if data is gone, doing a new search will find only the
> truncated data, so sending only the truncated data seems reasonable.

This looks good to me.

bb:approve

Ian C.