[Mono-dev] System.Web regressions

[Juraj Skripsky]

Hello,

While testing one of our bigger web applications on the partly rewritten
System.Web, I ran across two regressions:

- global.asax: Session_Start and Session_End is never called

- HttpRequest.get_UrlReferrer throws an exception if there is no
referrer (e.g. the page was requested by typing in the Url in the
browser)

The (small) attached patch fixes the second problem. May I commit? I'm
not yet brave enough to look into the first one...

- Juraj