This MIB entry determines whether or not processes within a jail
have access to System V IPC primitives. In the current jail imple-
mentation, System V primitives share a single namespace across the
host and jail environments, meaning that processes within a jail
would be able to communicate with (and potentially interfere with)
processes outside of the jail, and in other jails. As such, this
functionality is disabled by default, but can be enabled by setting
this MIB entry to 1.