Added allowFreeStandingZoneFaces flag

This determines when faceZones and cellZones are being meshed any zone faces
can only be on the boundary of the cellZone or also 'free standing'. The
latter option can be used to e.g. create free-standing baffles
(that do not separate two regions)

src/mesh/autoMesh/autoHexMesh/autoHexMeshDriver/autoRefineDriver.C

@@ -560,7 +560,11 @@ void Foam::autoRefineDriver::zonify
             const_cast<Time&>(mesh.time())++;
         }
 
-        meshRefiner_.zonify(refineParams.keepPoints()[0]);
+        meshRefiner_.zonify
+        (
+            refineParams.keepPoints()[0],
+            refineParams.allowFreeStandingZoneFaces()
+        );
 
         if (debug)
         {