Fix around martian queries being timed out.
Fix around martian queries being timed out.

People are reporting that dnsTimeoutHandler triggers for queries that
are not on the in-flight list.  This is a quick and dirty workaround
until I track that down.

darcs-hash:20070826205103-4cc09-8e62e2000fab2bc1556310265511ff778e11f925.gz

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