Add HISTORY sections to ZFS and dtrace manpages

[gbe]

Summary

Add HISTORY sections to ZFS and dtrace manpages

Test Plan

mandoc output review

[carlavilla]

@bcr and @imp can I make the commit for this files?

[bcr]

@allanjude : Is that OK, considering the upstream changes to those man pages?

[gbe]

@bcr @allanjude As far as I know, these manpages where converted to mdoc a while ago, so an easy upstream adaption isn't that this simple as it may seems. This was driving me towards a FreeBSD only HISTORY section for the manpages.

Gordon

[gbe]

@bcr can this be committed? I would afterwards upstream this patch to the OpenSolaris folks, considering, they like HISTORY sections. ;-)

[bcr]

OK then. Thanks for following up on this.