Greg Wooledge:
Neither of those links talks about jessie's specific default script that waits for network interfaces to start.
They do, however, explain what LSB has to do with things, which was what you wondered about. Greg Wooledge:
Neither do they mention this "van Smoorenburg".
Miguel van Smoorenburg. He originally wrote the rc system that ran that script. Other rc systems include the one written for NetBSD by Luke Mewburn.