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            If L{True}, do not allow anonymous sessions; defaults to L{True}.

        @param verifyOnce: If True, do not re-verify the certificate on session
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            attacks and to ensure perfect forward secrecy.

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        @param extraCertChain: List of certificates that I{complete} your
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        @type extraCertChain: C{list} of L{OpenSSL.crypto.X509}

        @param acceptableCiphers: Ciphers that are acceptable for connections.
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        @type acceptableCiphers: L{IAcceptableCiphers}

        @param dhParameters: Key generation parameters that are required for
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        @type dhParameters: L{DiffieHellmanParameters
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        @param trustRoot: Specification of trust requirements of peers.  If
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            those options in combination with this one will raise a
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        @type trustRoot: L{IOpenSSLTrustRoot}

        @param acceptableProtocols: The protocols this peer is willing to speak
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