fix(http): fix another instance of keep-alive busy-looping
fix(http): fix another instance of keep-alive busy-looping

hyperium/hyper,nickgonzales/hyper,yazaddaruvala/hyper,tshepang/hyper,Twey/hyper,golddranks/hyper,hyperium/hyper,hyperium/hyper,tshepang/hyper,golddranks/hyper,Twey/hyper,nickgonzales/hyper,Twey/hyper,tshepang/hyper,golddranks/hyper,nickgonzales/hyper,yazaddaruvala/hyper