Approved by:	re (implicit)

This commit was manufactured to restore the state of the 8.2-RELEASE image.

This should reduce size of the minidump.
Compatibility with version 1 should be preserved in libkvm.

  Fix typo in comment.

Approved by:	re (bz)

instead of kmem.

Additionally, because of sysctl(3) use (which is generally good), behaviour
for crash dumps differs slightly from behaviour for live kernels and this
will probably never be fixed entirely, so weaken that claim.

Add a missing else that negated the truncation of ki_ngroups to NGROUPS.

Submitted by:   Dmitry Pryanishnikov <lynx dot ripe at gmail dot com>

Fix a copy-paste bug when reading data from the last 3 (7 for PAE) bytes of
a page mapped by a large page in the kernel.

cr_groups is no longer embedded in struct ucred and is instead stored
in a seperate array.  As such we need to use kvm_read rather than bcopy
to populate the ki_groups field.

This fixes a crash when running ps -ax on a coredump.

Reported by:	brucec
Tested by:	brucec
MFC after:	3 days
Approved by:	re@ (kib)

  Rather than replicating the maths from the kernel, use the
  value the kernel calculated directly as we already read it
  with struct vnet.  This will make kvm_vnet.c more resilent
  in case of possible kernel changes.

  Reviewed by:  rwatson

Approved by:	re (kib)

vnet.h, we now use jails (rather than vimages) as the abstraction
for virtualization management, and what remained was specific to
virtual network stacks.  Minor cleanups are done in the process,
and comments updated to reflect these changes.

Reviewed by:	bz
Approved by:	re (vimage blanket)

in up to 16 (KI_NGROUPS) values and steal a bit from ki_cr_flags
(all bits currently unused) to indicate overflow with the new flag
KI_CRF_GRP_OVERFLOW.

This fixes procstat -s.

Approved by: re (kib)