return to Win7 compatibility, add auto proxy support and auto proxy auth#2

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leszekm1 wants to merge 2 commits intoPingmanTools:masterfrom

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Commits on Nov 28, 2017

revert WebSocketHandle class to the previous version that had its own HTTP stack on top of a TCP socket to allow Win7 compatibility. Add automatic HTTP proxy support. Add automatic proxy authenti…
Leszek
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fix null reference when no proxy is set via options
Leszek
committed