fix crashes on requests with bad HTTP header lines
fix crashes on requests with bad HTTP header lines

many other places in yaws dont expect an {http_error, _} to be
in #headers.others, causing crashes all over the code

jgrinstead/yaws,jgrinstead/yaws,jgrinstead/yaws,jgrinstead/yaws,jgrinstead/yaws,jgrinstead/yaws,jgrinstead/yaws