Don't break on Upgrade headers.
Don't break on Upgrade headers.

Thanks to voyageur and Black Rider.

galeksandrp/polipo,berkley4/polipo,ssb22/polipo2,berkley4/polipo,jech/polipo,ssb22/polipo2,ssb22/polipo2,jech/polipo,jech/polipo,galeksandrp/polipo,berkley4/polipo,galeksandrp/polipo