Don't format headers in writeHeaders if we already know they won't fit.
Don't format headers in writeHeaders if we already know they won't fit.

darcs-hash:20061126214836-4cc09-10d5c738255ea7e98e632f8f00aa130d126a56e7.gz

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