Fix another problem in XAccelMiddleware
Fix another problem in XAccelMiddleware

The path from the XSF header is also a bytestring so let's not compare
it with a unicode string.

mvidalgarcia/indico,OmeGak/indico,OmeGak/indico,ThiefMaster/indico,DirkHoffmann/indico,indico/indico,OmeGak/indico,pferreir/indico,OmeGak/indico,indico/indico,mic4ael/indico,pferreir/indico,DirkHoffmann/indico,ThiefMaster/indico,ThiefMaster/indico,mic4ael/indico,mic4ael/indico,DirkHoffmann/indico,indico/indico,mvidalgarcia/indico,mvidalgarcia/indico,pferreir/indico,DirkHoffmann/indico,mic4ael/indico,indico/indico,pferreir/indico,mvidalgarcia/indico,ThiefMaster/indico