This removes a horrible mess of shoving various process pointers into
byte arrays and (potentially) pushing them across a process boundary
in a gross fashion. Killed the SvLBoxDDInfo struct, and its many
un-used members. Instead use the existing (also non-ideal) global
variable to track the relevant state.

Change-Id: I0b694bd530e7019042d22e46db831b5a4aae0e23