11282 port ZoL send/recv fixes
Review Request #2190 - Created July 17, 2019 and submitted
This is a port from ZoL of several send/recv commits which are listed in the bug report.
ZFS test run, including several additional tests which previously did not work on illumos.
I think this looks good. I just have the one question about a possible 11309 regression. Do you think you could add the new tests to the smartos runfile as well?