Update vendor/opensolaris to last OpenSolaris state (13149:b23a4dab3d50)
Add ZFS bits to vendor/opensolaris

Obtained from:	https://hg.openindiana.org/upstream/oracle/onnv-gate
Move dtrace manual page to new vendor location
Import relevant vendor manual pages from illumos-gate
revision 13304:b54231762cfa

Obtained from:	ssh://anonhg@hg.illumos.org/illumos-gate
Update vendor/illumos/dist to pre libzfs_core state (dtrace and ctf part)
illumos-gate revision 13742:b6bbdd77139c

Obtained from:	ssh://anonhg@hg.illumos.org/illumos-gate
Update vendor/illumos/dist to pre libzfs_core state (zfs part)
illumos-gate revision 13742:b6bbdd77139c

Obtained from:	ssh://anonhg@hg.illumos.org/illumos-gate
Add zhack command missing from vendor import
illumos-gate revision 13742:b6bbdd77139c

Obtained from:	ssh://anonhg@hg.illumos.org/illumos-gate
Update vendor-sys/illumos/dist to illumos-gate 13752:9f5f6c52ba19
(zfs part)

Obtained from:	ssh://anonhg@hg.illumos.org/illumos-gate
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 13934:9e23a7f7b812

Illumos ZFS issues:
 3422 zpool create/syseventd race yield non-importable pool
 3425 first write to a new zvol can fail with EFBIG
Update vendor-sys/illumos/dist to illumos-gate version 13937:6b4f289e7094

Illumos ZFS issues:
 3468 mdb enhancements for zfs development (not relevant for FreeBSD)
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 13939:20e4d8d8da6d

illumos dtrace issues:
  3511 dtrace.c erroneously checks for memory alignment on amd64
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 13941:d48547176ab4

Illumos ZFS issues:
  3498 panic in arc_read(): !refcount_is_zero(&pbuf->b_hdr->b_refcnt)
Update vendor-sys/illumos/dist to illumos-gate version 13945:7a9c1d41dfbe

Illumos ZFS issues:
  3507 Tunable to allow block allocation even on degraded vdevs
Update vendor-sys/illumos/dist to illumos-gate version 13949:4f6a155f70fe

Illumos ZFS issues:
  3512 rounding discrepancy in sa_find_sizes()
  3513 mismatch between SA header size and layout
Update vendor-sys/illumos/dist to illumos-gate 13952:7a22d0770fc8

Illumos ZFS issues:
  3522 zfs module should not allow uninitialized variables
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 13953:0cc6917308f7

Illumos dtrace issues:
  3529 iostat should display time used by dtrace
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 13957:512faafc0eaf

Illumos ZFS issues:
  3537 want pool io kstats
Update vendor-sys/illumos/dist to illumos-gate 13958:1fd91513472c

Illumos ZFS issues:
  3561 arc_meta_limit should be exposed via kstats
  3116 zpool reguid may log negative guids to internal SPA history
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 13959:e03e14ddfb4c

Illumos ZFS issues:
  3552 condensing one space map burns 3 seconds of CPU in spa_sync() thread
  3564 spa_sync() spends 5-10% of its time in metaslab_sync() (when not
       condensing)
Update vendor-sys/illumos/dist to illumos-gate 13966:0e1d84ebb004

Illumos ZFS issues:
  3578 transferring the freed map to the defer map should be constant time
  3579 ztest trips assertion in metaslab_weight()
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 13967:92bec6d87f59

Illumos ZFS issues:
  3557 dumpvp_size is not updated correctly when a dump zvol's size is
       changed
  3558 setting the volsize on a dump device does not return back ENOSPC
  3559 setting a volsize larger than the space available sometimes succeeds