Minor update for 4.0: expr and &Attribute-Name[*]

[Alan DeKok]

  As an example (useless, but an example)

update request {
	NAS-Port := 1
	NAS-Port := 2
	NAS-Port := 3
}

update reply {
	Filter-Id := "%{expr: 0 + &NAS-Port[*]}"
}

  Send it a packet, and you get:

	Filter-Id := "6"

  Minor, but nice.

  I've also been pushing updates to Alcatel's stupid struct attributes.  If anyone else has time for similar changes, it would be appreciated.

  Alan DeKok.