Asynchronously perform forward resolution of a query to a list of entries.

template<
    typename ResolveHandler>
void async_resolve(
    const query & q,
    ResolveHandler handler);
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Asynchronously perform reverse resolution of an endpoint to a list of entries.

template<
    typename ResolveHandler>
void async_resolve(
    const endpoint_type & e,
    ResolveHandler handler);
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