Replace references to VisualServer in code comments with RenderingServer

VisualServer no longer exists in the `master` branch.

modules/bullet/soft_body_bullet.cpp

@@ -71,7 +71,7 @@ void SoftBodyBullet::update_rendering_server(RenderingServerHandler *p_rendering
 		return;
 	}
 
-	/// Update visual server vertices
+	/// Update rendering server vertices
 	const btSoftBody::tNodeArray &nodes(bt_soft_body->m_nodes);
 	const int nodes_count = nodes.size();
 
@@ -298,11 +298,11 @@ bool SoftBodyBullet::set_trimesh_body_shape(Vector<int> p_indices, Vector<Vector
 	ERR_FAIL_COND_V(p_indices.is_empty(), false);
 	ERR_FAIL_COND_V(p_vertices.is_empty(), false);
 
-	/// Parse visual server indices to physical indices.
-	/// Merge all overlapping vertices and create a map of physical vertices to visual server
+	/// Parse rendering server indices to physical indices.
+	/// Merge all overlapping vertices and create a map of physical vertices to rendering server
 
 	{
-		/// This is the map of visual server indices to physics indices (So it's the inverse of idices_map), Thanks to it I don't need make a heavy search in the indices_map
+		/// This is the map of rendering server indices to physics indices (So it's the inverse of idices_map), Thanks to it I don't need make a heavy search in the indices_map
 		Vector<int> vs_indices_to_physics_table;
 
 		{ // Map vertices

modules/theora/video_stream_theora.cpp

@@ -108,7 +108,7 @@ void VideoStreamPlaybackTheora::video_write() {
 
 	Ref<Image> img = memnew(Image(size.x, size.y, 0, Image::FORMAT_RGBA8, frame_data)); //zero copy image creation
 
-	texture->update(img); //zero copy send to visual server
+	texture->update(img); //zero copy send to rendering server
 
 	frames_pending = 1;
 }

modules/webm/video_stream_webm.cpp

@@ -311,7 +311,7 @@ void VideoStreamPlaybackWebm::update(float p_delta) {
 
 						if (converted) {
 							Ref<Image> img = memnew(Image(image.w, image.h, 0, Image::FORMAT_RGBA8, frame_data));
-							texture->update(img); //Zero copy send to visual server
+							texture->update(img); //Zero copy send to rendering server
 							video_frame_done = true;
 						}
 					}