Avoid spurious error message in tunnels.
Avoid spurious error message in tunnels.

dxq-git/polipo,ssb22/polipo2,akkakks/polipo,akkakks/polipo,berkley4/polipo,feijilei/polipo,nxtreaming/chumen,galeksandrp/polipo,berkley4/polipo,jech/polipo,nxtreaming/chumen,berkley4/polipo,ssb22/polipo2,dxq-git/polipo,fqtools/polipo,fqtools/polipo,feijilei/polipo,Psiphon-Inc/polipo,fqtools/polipo,lkraider/polipo,lkraider/polipo,nxtreaming/chumen,TierraDelFuego/opilop,galeksandrp/polipo,galeksandrp/polipo,dxq-git/polipo,jech/polipo,clowwindy/polipo,akkakks/polipo,ssb22/polipo2,feijilei/polipo,lkraider/polipo,ajmgh/polipo,jech/polipo