MFC r339956 r362170: Add HISTORY sections to ZFS and dtrace manpages

r362170
Add HISTORY sections to ZFS and dtrace manpages

Reviewed by: bcr (mentor)
Approved by: bcr (mentor)
Differential Revision: https://reviews.freebsd.org/D23833

r339956:
dtrace(1): remove reference to dtruss that was removed from base
system in r300226.

PR: 211618
Reviewed by: gnn, markj, 0mp
Approved by: kib (mentor, implicit)
Differential Revision: https://reviews.freebsd.org/D17762