fix (*http.Server).Serve() exiting on ErrBadProxyLine
fix (*http.Server).Serve() exiting on ErrBadProxyLine

anything other than a (net.Error) with Temporary() == true
is treated as a fatal error that causes the http server to exit

DanielOaks/oragono,oragono/oragono,DanielOaks/oragono,oragono/oragono,oragono/oragono