"On Mention in a Book" (書籍掲載に ついて)

Hello, A mail written in Japanese was sent to debian-www list. http://lists.debian.org/debian-www/2001/debian-www-200109/msg00254.html This is from a Japanese publishing company, which asks us to agree with that www.debian.org is introduced in their book. How should we reply? Note: I visited the

Why is L2TPD not distributed with Debian Linux?

I'm curious why L2TP is not distributed as part of the Debian Linux distribution. Is it not GPL? Are there licensing issues? Thanks, Karl