[IPSEC] Check encap_type at config time

[Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>]

On Fri, Jun 25, 2004 at 10:11:47PM +1000, herbert wrote:
> 
> PS I will be doing a similar patch for the encap_type in xfrm.

Here is the patch to check encap_type at the earliest possible
opportunity in xfrm_user/af_key.

This will allow us to assume in esp4 that the encap_type from x->encap
is always valid.

Cheers,
-- 
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Email:  Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx>
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