Add a task action for the star formation task. Add the new engine policy's name string.

src/engine.c

@@ -111,6 +111,7 @@ const char *engine_policy_names[] = {"none",
                                      "sourceterms",
                                      "stars",
                                      "structure finding",
+                                     "star formation",
                                      "feedback"};
 
 /** The rank of the engine as a global variable (for messages). */

src/task.c

@@ -123,6 +123,9 @@ __attribute__((always_inline)) INLINE static enum task_actions task_acts_on(
       return task_action_part;
       break;
 
+    case task_type_star_formation:
+      return task_action_all;
+
     case task_type_stars_ghost:
       return task_action_spart;
       break;