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Make Twisted use M2Crypto for SSL

Copyright (c) 2004-2007 Open Source Applications Foundation.
All rights reserved.
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    A convenience function to start an SSL/TLS connection using Twisted.
    
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    A convenience function to listen for SSL/TLS connections using Twisted. 

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    A convenience function to listen for TCP connections using Twisted. 
    
    NOTE: You must call startTLS(ctx) to go into SSL/TLS mode.

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    The purpose of this class is to eliminate the __del__ method from
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    The purpose of this class is to eliminate the __del__ method from
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        @param factory:
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        @param contextFactory:      Factory that creates SSL.Context objects.
                                    The called function is getContext().
        @param postConnectionCheck: The post connection check callback that
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