Pull upstream patch to fix ee(1) crash when received SIGWINCH:

  modify _nc_wgetch() to check for a -1 in the fifo, e.g., after a
  SIGWINCH, and discard that value, to avoid confusing application
  (patch by Eygene Ryabinkin, FreeBSD bin/136223).

PR:		136223
Submitted by:	Eygene Ryabinkin
Obtained from:	ncurses-5.7-20091024 snapshot
MFC after:	3 days
- Fix wrong manpage title for keybound.3X

PR:		docs/148864
Obtained from:	ncurses-5.7-20081213 snapshot
Import a stock copy of ncurses 5.8 into the vendor space.

It seems both local changes we made to 5.7 have already been fixed
upstream properly, so there is no need to preserve the changes. Also,
with SVN we import full source trees. Unlike CVS, where we removed
unneeded cruft.
Import ncurses 5.9.
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 14089:520f3adc5d46:

Illumos ZFS issues:
  3894 zfs should not allow snapshot of inconsistent dataset
Update vendor/illumos/dist to illumos-gate 14096:12d3631da129:

Illumos ZFS issues:
  3909 "zfs send -D" does not work
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 14120:e9e346400fef:

Illumos ZFS issues:
  3949 ztest fault injection should avoid resilvering devices
  3950 ztest: deadman fires when we're doing a scan
  3951 ztest hang when running dedup test
  3952 ztest: ztest_reguid test and ztest_fault_inject don't place nice together
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 14121:6f5ac5d649af:

Illumos ZFS issues:
  3955 ztest failure: assertion refcount_count(&tx->tx_space_written) + delta <= tx->tx_space_towrite
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 14122:1e57939bc87d:

Illumos ZFS issues:
  3956 ::vdev -r should work with pipelines
  3957 ztest should update the cachefile before killing itself
  3958 multiple scans can lead to partial resilvering
  3959 ddt entries are not always resilvered
  3960 dsl_scan can skip over dedup-ed blocks if
       physical birth != logical birth
  3961 freed gang blocks are not resilvered and can cause pool to suspend
  3962 ztest should print out zfs debug buffer before exiting
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 14137:f7523d207d74:

Illumos ZFS issues:
  3996 want a libzfs_core API to rollback to latest snapshot
Update vendor/illumos/dist and vendor-sys/illumos/dist
to illumos-gate 14143:42d090a37218:

Illumos DTrace issues:
  3089 want ::typedef
  3094 libctf should support removing a dynamic type
  3095 libctf does not validate arrays correctly
  3096 libctf does not validate function types correctly
Update vendor/illumos/dist to 14148:fe28bd725808:

Illumos DTrace issues:
  4005 libctf can't deal with extended sections
Update vendor/illumos/dist to 14152:46f5fb0b0d36:

Illumos DTrace issues:
  4061 libzfs: memory leak in iter_dependents_cb()
Update vendor/illumos/dist and vendor-sys/illumos/dist
to 14159:dc75c925d8aa:

Illumos ZFS issues:
  2932 support crash dumps to raidz, etc. pools
Update vendor/illumos/dist to 14160:734110b9882f:

Illumos ZFS issues:
  1765 assert triggered in libzfs_import.c trying to import pool
       name beginning with a number
Update vendor/illumos/dist and vendor-sys/illumos/dist
to 14164:dceb17481b99:

Illumos ZFS issues:
  4045 zfs write throttle & i/o scheduler performance work
3933 contract adoption can race

illumos/illumos-gate@a81df0a5d715363cc1841810a87818dfa95675c0

Note we now reference illumos commits in the github repository as the
mercurial mirror seems to be neglected.

For connectivity:
r255255 referenced 14164:dceb17481b99 which is
illumos/illumos-gate@69962b5647e4a8b9b14998733b765925381b727e

r255258 referenced 14176:15e9457c12ec which is
illumos/illumos-gate@cf746768a898264fa491791a8252865e5338dc67
4101 metaslab_debug should allow for fine-grained control

4102 space_maps should store more information about themselves
4103 space map object blocksize should be increased
4104 ::spa_space no longer works
4105 removing a mirrored log device results in a leaked object
4106 asynchronously load metaslab

Revision illumos/illumos-gate@0713e232b7712cd27d99e1e935ebb8d5de61c57d
4168 ztest assertion failure in dbuf_undirty

4169 verbatim import causes zdb to segfa
4170 zhack leaves pool in ACTIVE state

illumos/illumos-gate@7fdd916c474ea52896c671bbe7b56ba34a1ca132
4171 clean up spa_feature_*() interfaces

4172 implement extensible_dataset feature for use by other zpool
features

illumos/illumos-gate@2acef22db7808606888f8f92715629ff3ba555b9