Fix typo: childs -> children

src/startup.c

@@ -118,10 +118,10 @@ void startup_sequence_delete(struct Startup_Sequence *sequence) {
 }
 
 /*
- * Starts the given application by passing it through a shell. We use double fork
- * to avoid zombie processes. As the started application’s parent exits (immediately),
- * the application is reparented to init (process-id 1), which correctly handles
- * childs, so we don’t have to do it :-).
+ * Starts the given application by passing it through a shell. We use double
+ * fork to avoid zombie processes. As the started application’s parent exits
+ * (immediately), the application is reparented to init (process-id 1), which
+ * correctly handles children, so we don’t have to do it :-).
  *
  * The shell used to start applications is the system's bourne shell (i.e.,
  * /bin/sh).