refactor(h1): give better panics in debug mode when headers successfully parse illegal values
refactor(h1): give better panics in debug mode when headers successfully parse illegal values

yazaddaruvala/hyper,yazaddaruvala/hyper,tshepang/hyper,tshepang/hyper,tshepang/hyper,hyperium/hyper,hyperium/hyper,hyperium/hyper