Fix length of Extended INQUIRY Data VPD page.

MFC after:	3 days


git-svn-id: svn+ssh://svn.freebsd.org/base/head@272597 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
MFV r272585:

Split the godfather zio into CPU number's to reduce lock
contention.

Illumos issue:
    5176 lock contention on godfather zio

MFC after:	2 weeks


git-svn-id: svn+ssh://svn.freebsd.org/base/head@272598 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
MFV r272588:

Handle old format deadlist.

Illumos issue:
    5178 zdb -vvvvv on old-format pool fails in dump_deadlist()

MFC after:	2 weeks


git-svn-id: svn+ssh://svn.freebsd.org/base/head@272599 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f