vacuumlo is rather simpleminded about dealing with the list of LOs to be
removed - it just fetches them as a straight resultset. For one of my
our this resulted in an out of memory condition. The attached patch
tries to remedy that by using a cursor instead. If this is wanted I will
add it to the next commitfest. The actualy changes are very small - most
of the patch is indentation changes due to the introduction of an extra
loop.
cheers
andrew
