Revert busy refcount back to int. As a side note, multiple open is still (and always) possible and does not change previous behaviour.
Revert busy refcount back to int. As a side note, multiple open
is still (and always) possible and does not change previous behaviour.

Requested by:	netchild

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase