Fix the HostSwitch example
Fix the HostSwitch example

Thanks to Tobias Schwarz for reporting problems!
TheHippo/httprouterc,hawx/route,cmars/tools,Pacoup/httprouter,laurennicoleroth/httprouter,julienschmidt/httprouter,kingland/httprouter,EricLagergren/httprouter,glycerine/httprouter,sdac/httprouter,buaazp/fasthttprouter,yosssi/httprouter,agaurav/httprouter,b54898533/httprouter,cmars/tools,jjeffery/httprouter,herzog31/httprouter,cmars/tools,cmars/tools,hiteshjoshi/httprouter,nigeldunn/httprouter