I'd like to thank the following people for their contributions to this document (in no particular order): Axel Boldt, Arnt Gulbrandsen, Gary Allpike, Cees de Groot, Alan Cox, Jonathon Naylor, Claes Ensson, Ron Nessim, John Minack, Jean-Pierre Cocatrix, Erez Strauss.
A special thanks to Alessandro Rubini for his excellent feedback and contributed corrections.