Update HttpServer.swift
Update HttpServer.swift

solve compiler error : 'NSTextCheckingResult?' does not have a member named 'rangeAtIndex'
jphughes/swifter,Sillyplus/swifter,ziper1/swifter,hejunbinlan/swifter,ziper1/swifter,glock45/swifter,modulexcite/swifter,modulexcite/swifter,httpswift/swifter,ziper1/swifter,asus4/swifter,qpre/swifter,hejunbinlan/swifter,glock45/swifter,julien-c/swifter,JetForMe/swifter,asus4/swifter,asus4/swifter,httpswift/swifter,hejunbinlan/swifter,johnlinvc/swifter,qpre/swifter,julien-c/swifter,jphughes/swifter,Sillyplus/swifter,glock45/swifter,JetForMe/swifter,glock45/swifter,Sillyplus/swifter,JetForMe/swifter,qpre/swifter,julien-c/swifter,glock45/swifter,johnlinvc/swifter