Crash fix: HTTP2ClientRequestHandler can deal with failing writes#558

fabianfett merged 2 commits intoswift-server:mainswift-server/async-http-client:mainfrom

fabianfett:ff-crash-in-http-client-request-handlerfabianfett/async-http-client:ff-crash-in-http-client-request-handlerCopy head branch name to clipboard