draft-ietf-v6ops-security-overview-06.txt comments

[Jun-ichiro itojun Hagino <itojun@itojun.org>]

	i'm not too sure if the document have reached WGLC or not, but anyways,
	there are some critical comments coming up from my side.
	http://ipv6samurais.com/ipv6samurais/openbsd-audit/
	(still under development)

	overall (up to 2.1.9):
	- i'm not too sure if it is appropriate to go into middleboxes too much
	  in this document or not.  the document should clear up its standpoint
	  either to the standards side (like those who write specifications for
	  normal nodes), or to the "real life" side (like those who implement
	  middleboxes)
	- i guess we need some upper-limit on a number of hop-by-hop option
	  headers present on a packet.  i would say "at most 1", as the sender
	  can encodde as many stuffs as needed into a single hop-by-hop option
	  header.

itojun