make_filter: cope with filters that are already parenthesized Treat filter elements correctly that may be more complex filters themselves; e.g. '(&(sn=Doe)(givenname=John))'

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46dfe9d6f3680bf38aeddda68f014fc8bf6517fc 0.3
664bbe3dcd44e842559978725bf2128538a2b40a 0.4