[PATCH 3rd revision] Add SELinux context support to AUDIT target

[Mr Dash Four]

> how is this error preserved in the audit trail?
>   
Look at my patch again - if the secctx cannot be retrieved, either 
because a) it does not exists; or b) because of internal error or 
otherwise, then it is not logged in the audit log as part of the 
NETFILTER_PKT message (the fact there is internal LSM error has 
absolutely nothing to do with a netfilter packet!).

If, internally (upon calling security_secid_to_secctx) there is a 
decision to handle that *internal* error in one way or another so be it, 
but as far as my patch goes - there is no secctx if that function 
returns nothing and I think that is the right think to do.