Stop disabling the NONE cypher in SSH, so we can use it for lower-overhead
replication.
Well, if you make something no longer be NO, it must be made YES. There is
no such thing as MAYBE or YES-BY-DEFAULT in the BSD make system now.  Huh!
Revert "Well, if you make something no longer be NO, it must be made YES. There is"

This reverts commit d336fbaf8f33b33bfa27fe2349a56c17a0ab68e3.
Revert "Stop disabling the NONE cypher in SSH, so we can use it for lower-overhead"

This reverts commit d82c17b28e8575ca177748eaca035ef3fe58a6b6.
Enable the None cipher support the only way I know how for now (we can
revert this later if it turns out there's a better way that works).
That's... weird.  This commit disappeared and broke the none cipher again.
Fixing.
Merge branch 'feature/unified_freebsd' of gitserver.ixsystems.com:/git/repos/freenas-build/trueos into feature/unified_freebsd
Merge remote-tracking branch 'origin/feature/unified_freebsd' into 93M1-DEMO