illumos gate

Alex's original testing notes:

    Built new PI from clobber with the patch
    Booted new PI on a test machine
    Verified that "auditconfig -setpmask $$ as,lo" now produces an audit event
    Verified that "praudit" prints the new audit event properly
    Verified that removing the "as" class causes the new event for setpmask to be suppressed
    Verified that "auditconfig -setkmask" now produces an event
    Verified that adding the "aa" class causes events from "auditconfig -getkmask" and "auditconfig -getpinfo" to be produced, and that removing it suppresses them

I re-verified a few of these after the merge.

Example praudit XML output:

<record version="2" event="auditon(2) - set kernel mask" modifier="sp" host="90-e2-ba-d3-ec-a0" iso8601="2019-09-30 07:27:31.780 +00:00">
  <argument arg-num="2" value="0x21000" desc="setkmask:as_success"/>
  <argument arg-num="2" value="0x21000" desc="setkmask:as_failure"/>
  <subject audit-uid="root" uid="root" gid="root" ruid="root" rgid="root" pid="12583" sid="3441870303" tid="3245 71168 10.33.1.141"/>
  <use_of_privilege result="successful use of priv">sys_audit</use_of_privilege>
  <return errval="success" retval="0"/>
  <zone name="global"/>
</record>

<record version="2" event="auditon(2) - set process preselection mask" modifier="sp" host="90-e2-ba-d3-ec-a0" iso8601="2019-09-30 07:44:56.165 +00:00">
  <argument arg-num="3" value="0x2e67" desc="setpmask:pid"/>
  <argument arg-num="3" value="0x40221022" desc="setpmask:as_success"/>
  <argument arg-num="3" value="0x40221022" desc="setpmask:as_failure"/>
  <subject audit-uid="root" uid="root" gid="root" ruid="root" rgid="root" pid="13104" sid="3441870303" tid="3245 71168 10.33.1.141"/>
  <use_of_privilege result="successful use of priv">sys_audit</use_of_privilege>
  <return errval="success" retval="0"/>
  <zone name="global"/>
</record>