smf: switch to a tri-state for process-security properties true=on,false=off,nil=default

*** 39,69 ****
                  <property_group name='startd' type='framework'>
                    <propval name='duration' type='astring' value='transient' />
                  </property_group>
  
                  <property_group name='default' type='application'>
!                   <propval name='aslr' type='boolean' value='false' />
!                   <propval name='forbidnullmap' type='boolean' value='false' />
!                   <propval name='noexecstack' type='boolean' value='false' />
  
                    <propval name='value_authorization' type='astring'
                             value='solaris.smf.value.process-security' />
                  </property_group>
  
                  <property_group name='lower' type='application'>
!                   <propval name='aslr' type='boolean' value='false' />
!                   <propval name='forbidnullmap' type='boolean' value='false' />
!                   <propval name='noexecstack' type='boolean' value='false' />
  
                    <propval name='value_authorization' type='astring'
                             value='solaris.smf.value.process-security' />
                  </property_group>
  
                  <property_group name='upper' type='application'>
!                   <propval name='aslr' type='boolean' value='true' />
!                   <propval name='forbidnullmap' type='boolean' value='true' />
!                   <propval name='noexecstack' type='boolean' value='true' />
  
                    <propval name='value_authorization' type='astring'
                             value='solaris.smf.value.process-security' />
                  </property_group>
  
--- 39,69 ----
                  <property_group name='startd' type='framework'>
                    <propval name='duration' type='astring' value='transient' />
                  </property_group>
  
                  <property_group name='default' type='application'>
!                   <property name='aslr' type='boolean' />
!                   <property name='forbidnullmap' type='boolean' />
!                   <property name='noexecstack' type='boolean' />
  
                    <propval name='value_authorization' type='astring'
                             value='solaris.smf.value.process-security' />
                  </property_group>
  
                  <property_group name='lower' type='application'>
!                   <property name='aslr' type='boolean' />
!                   <property name='forbidnullmap' type='boolean' />
!                   <property name='noexecstack' type='boolean' />
  
                    <propval name='value_authorization' type='astring'
                             value='solaris.smf.value.process-security' />
                  </property_group>
  
                  <property_group name='upper' type='application'>
!                   <property name='aslr' type='boolean' />
!                   <property name='forbidnullmap' type='boolean' />
!                   <property name='noexecstack' type='boolean' />
  
                    <propval name='value_authorization' type='astring'
                             value='solaris.smf.value.process-security' />
                  </property_group>