cleanup linking

add files that were not committed

dtrace fixes. improve handling of library paths.

fix examples in zfs(8) man page

Illumos 13879:4eac7a87eff2
3329 spa_sync() spends 10-20% of its time in spa_free_sync_cb()
3330 space_seg_t should have its own kmem_cache
3331 deferred frees should happen after sync_pass 1
3335 make SYNC_PASS_* constants tunable

New loader-only tunables:
vfs.zfs.sync_pass_deferred_free
vfs.zfs.sync_pass_dont_compress
vfs.zfs.sync_pass_rewrite

References:
https://www.illumos.org/issues/3329
https://www.illumos.org/issues/3330
https://www.illumos.org/issues/3331
https://www.illumos.org/issues/3335

Import the zio nop-write improvement from Illumos. To reduce I/O,
nop-write omits overwriting data if the checksum (cryptographically
secure) of new data matches the checksum of existing data.
It also saves space if snapshots are in use.

It currently works only on datasets with enabled compression, disabled
deduplication and sha256 checksums.

IllumOS 13887:196932ec9e6a and 13888:7204b3392a58
3236 zio nop-write

References:
https://www.illumos.org/issues/3236

Add loader(8) tunable to enable/disable nopwrite functionality:
vfs.zfs.nopwrite_enabled

Introduce a new dataset aclmode setting "restricted" to protect ACL's
being destroyed or corrupted by a drive-by chmod.

illumos-gate 13889:a67716f16746
3254 add support in zfs for aclmode=restricted

Update manpage dates in zfs.8 and zpool.8

Cast result from third param to int to resolve a wformat issue

reset props for svn keywords

update/sync

Update zfs command to sync with zfs v28

update zfs version

update zfs build environment.

update zfs & dtrace build environment

turn on warns 0

Fix several issues with world

missed on last commit

add manifest

add dtrace & friends

sanity fixes for compiler

$MidnightBSD$, fix paths

Add the open solaris compatiblity libraries under cddl

Fix some of the paths to files.

what the hell.. let's throw in some preperation for zfs.