merge a new version of the CDDL dtrace and ZFS code.
this changes the upstream vendor from OpenSolaris to FreeBSD,
and this version is based on FreeBSD svn r315983.

in addition to the 10 years of im

merge a new version of the CDDL dtrace and ZFS code.
this changes the upstream vendor from OpenSolaris to FreeBSD,
and this version is based on FreeBSD svn r315983.

in addition to the 10 years of improvements from upstream,
this version also has these NetBSD-specific enhancements:
- dtrace FBT probes can now be placed in kernel modules.
- ZFS now supports mmap().

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Omit spurious include of <sys/isa_defs.h> in dtrace tools build.

Fixes dtrace tools cross-build from architectures with no dtrace
support:

# compile libctf/ctf_create.lo
[...]
/export/anoncvs/sr

Omit spurious include of <sys/isa_defs.h> in dtrace tools build.

Fixes dtrace tools cross-build from architectures with no dtrace
support:

# compile libctf/ctf_create.lo
[...]
/export/anoncvs/src/tools/libctf/../../external/cddl/osnet/sys/sys/isa_defs.h:50:2: error: #error "architecture not supported"
#error "architecture not supported"
^

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Get DTrace to build again.

Import new Opensolaris sources for zfs/dtrace.

Opensolaris mercurial changeset: 11751:58c0c8f4305f

Import Opensolaris source code used with zfs port. Zfs code si from date
200811.