symmetryPlane: add symmetryPlane as a special type of symmetry condition applied to a single plane

The standard/previous general symmetry type is now named symmetry
    both in class and lookup name for consistency.  The rigorous
    symmetryPlane type is needed for moving-mesh cases in which the
    motion it constrained by one or two planes.

src/postProcessing/functionObjects/field/streamLine/streamLineParticle.C

@@ -345,6 +345,17 @@ void Foam::streamLineParticle::hitWedgePatch
 }
 
 
+void Foam::streamLineParticle::hitSymmetryPlanePatch
+(
+    const symmetryPlanePolyPatch& pp,
+    trackingData& td
+)
+{
+    // Remove particle
+    td.keepParticle = false;
+}
+
+
 void Foam::streamLineParticle::hitSymmetryPatch
 (
     const symmetryPolyPatch& pp,

src/postProcessing/functionObjects/field/streamLine/streamLineParticle.H

@@ -237,7 +237,15 @@ public:
             );
 
             //- Overridable function to handle the particle hitting a
-            //  symmetryPlane
+            //  symmetry plane
+            void hitSymmetryPlanePatch
+            (
+                const symmetryPlanePolyPatch&,
+                trackingData& td
+            );
+
+            //- Overridable function to handle the particle hitting a
+            //  symmetry patch
             void hitSymmetryPatch
             (
                 const symmetryPolyPatch&,