error where IPCS entries are not displayed because of a faulty
read of the "deleted" member of the embedded "kern_ipc_perm" data
structure. The "deleted" member was being read as a 4-byte integer,
but since it is declared as a "bool" type, only the lowest byte gets
set to 1 or 0. Since the structure is not zeroed-out when allocated,
stale data may be left in the upper 3 bytes, and the IPCS entry
gets rejected. The update is required for Linux 4.11 and greater
kernels, which reimplemented the IDR facility to use radix trees
in kernel commit 0a835c4f090af2c76fc2932c539c3b32fd21fbbb, titled
"Reimplement IDR and IDA using the radix tree". Without the patch,
if any IPCS entry exists, the command would fail with the message
"ipcs: invalid structure member offset: idr_top"
(anderson@redhat.com)
