[CIFS] Add destroy routine for dns_resolver

files (e.g. "cp -a") to Windows servers.  For mkdir and create honor setgid bit

on parent directory when server supports Unix Extensions but not POSIX

create. Update cifs.upcall version to handle new Kerberos sec flags

(this requires update of cifs.upcall program from Samba).

(this requires update of cifs.upcall program from Samba).  Fix memory leak

on dns_upcall (resolving DFS referralls).

Version 1.53

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	return rc;

}

static void

dns_resolver_destroy(struct key *key)

{

	kfree(key->payload.data);

}

struct key_type key_type_dns_resolver = {

	.name        = "dns_resolver",

	.def_datalen = sizeof(struct in_addr),

	.describe    = user_describe,

	.instantiate = dns_resolver_instantiate,

	.destroy     = dns_resolver_destroy,

	.match       = user_match,

};