Fix some of the proxy code paths#141

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daurnimator wants to merge 3 commits intomasterfrom

Commits on Mar 13, 2019

http/h1_stream: parse request-target out into scheme/authority/path
daurnimator
committed
http/{h1_stream,request}: new stream property indicating if absolute form is desired
daurnimator
committed
http/request: make sure we start tls when using a https proxy
daurnimator
committed