Fix up the echo.sh config script so that you can use it with LOV configs,

Fix up the echo.sh config script so that you can use it with LOV configs,
like "LOV=1 NAME=echo sh llmount.sh".  Note that LOV configs do not yet
work, but I know where the problem lies (we are not copying the full LOV
MD data to the user buffer primarily, although fixing this entails a bunch
of other changes I think).