[IPSEC] Fix ECN encapsulation for IPv6

[Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>]

Hi:

While doing the ECN patch I discovered that IPsec on IPv6 wasn't
encapsulating the ECN correctly.  This patch fixes that.

Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

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