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Lookup a name using multiple resolvers.

Future Plans: This needs someway to specify which resolver answered
the query, or someway to specify (authority|ttl|cache behavior|more?)
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    Lookup an address using multiple L{IResolver}s
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        Build a L{dns.Query} for the given parameters and dispatch it
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        @type name: C{str}
        @param name: DNS name to resolve.

        @type type: C{int}
        @param type: DNS record type.

        @type cls: C{int}
        @param cls: DNS record class.

        @type timeout: Sequence of C{int}
        @param timeout: Number of seconds after which to reissue the query.
            When the last timeout expires, the query is considered failed.

        @rtype: L{Deferred}
        @return: A L{Deferred} which fires with a three-tuple of lists of
            L{twisted.names.dns.RRHeader} instances.  The first element of the
            tuple gives answers.  The second element of the tuple gives
            authorities.  The third element of the tuple gives additional
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