Send Host header even to parent proxy.
Send Host header even to parent proxy.

Some proxies appear to take 2616 litterally and require that.  Reported
by Zoltan Ivanfi.

darcs-hash:20050919183051-4cc09-57a5bc468db930a2a5e6901de40747d865b19f4c.gz

feijilei/polipo,ajmgh/polipo,lkraider/polipo,akkakks/polipo,lkraider/polipo,galeksandrp/polipo,doublec/namecoin-polipo,jech/polipo,dxq-git/polipo,galeksandrp/polipo,strongwillow/polipo,nxtreaming/chumen,strongwillow/polipo,akkakks/polipo,nxtreaming/chumen,Android-Apps/polipo,danchr/polipo,dxq-git/polipo,jech/polipo,feijilei/polipo,fqtools/polipo,Android-Apps/polipo,ssb22/polipo2,jeromelebel/polipo,clowwindy/polipo,feijilei/polipo,TierraDelFuego/opilop,gorakhargosh/polipo,jech/polipo,akkakks/polipo,dxq-git/polipo,Psiphon-Inc/polipo,nxtreaming/chumen,ssb22/polipo2,lkraider/polipo,fqtools/polipo,fukusaka/polipo,toke/polipo,ssb22/polipo2,berkley4/polipo,fqtools/polipo,berkley4/polipo,caeies/polipo-caeies,galeksandrp/polipo,berkley4/polipo