Cleanup modules "solaris" and "zfs":

- Defer spa_config_load() until root is mounted.
- Restore the config path to "/etc/zfs/zpool.cache".
- Module "zfs" is type MODULE_CLASS_VFS and no longer depen

Cleanup modules "solaris" and "zfs":

- Defer spa_config_load() until root is mounted.
- Restore the config path to "/etc/zfs/zpool.cache".
- Module "zfs" is type MODULE_CLASS_VFS and no longer depends on "rootvnode".
- Module "solaris" no longer depends on "mp_online".
- Fix rump component registration to not detach "/dev/zfs" if
it didn't attach it.

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Don't allow module to init before mp_online.

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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DTrace: Add support for a simulated solaris_cpu[] data structure per
cpu. Needed for the FBT provider amongst other features.

Add NetBSD Solaris compat code and reachover Makefiles. Most of code written
by Andrew Doran some of it by me.

This is still work in progress code. There are known issues. Zfs can panic
your system

Add NetBSD Solaris compat code and reachover Makefiles. Most of code written
by Andrew Doran some of it by me.

This is still work in progress code. There are known issues. Zfs can panic
your system still. I will commit integration bits and needed kernel bits
later when we fix most obvious bugs. This code need some support from our
kernel which I will commit in a separate patch and therefore itnot work yet.

Issues:

1) Support for openat/fstatat syscalls.
2) getnewvnode locking against myself panic when reclaiming vnodes
3) Replace solaris taskq with our workqueue which doesn't need to alloc
anything during work.
4) Investigate problems with NO_WAIT allocations.

Oked by core@ and ad@.

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