Add ico to known MIME types.
Add ico to known MIME types.

darcs-hash:20061123194156-4cc09-d38ad0efb7bc9fc65e2b1b0d618226b491a26021.gz

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