More tweaks to generated script docs.

- The "private interface" section is still tracked, but no longer rendered.
  We can judge the usefulness of it later and add back if there's demand.

- Documentation of event handlers was being treated the same as event
  declarations.  Now handlers are tracked separately, but not currently
  rendered in the generated doc output since usefulness is questionable.

src/BroDoc.h

@@ -167,6 +167,18 @@ public:
 		all.push_back(o);
 		}
 
+	/**
+	 * Schedules documentation of an event handler declared by the script.
+	 * @param o A pointer to a BroDocObj which contains the internal
+	 *        Bro language representation of the script event handler and
+	 *        also any associated comments about it.
+	 */
+	void AddEventHandler(const BroDocObj* o)
+		{
+		event_handlers.push_back(o);
+		all.push_back(o);
+		}
+
 	/**
 	 * Schedules documentation of a function declared by the script.
 	 * @param o A pointer to a BroDocObj which contains the internal
@@ -228,6 +240,7 @@ protected:
 	BroDocObjList types;
 	BroDocObjList notices;
 	BroDocObjList events;
+	BroDocObjList event_handlers;
 	BroDocObjMap functions;
 	BroDocObjList redefs;