Address Sanitizer exception on hello world example

[lookbusy1344]

I was trying the hello world example with VS2022 and Address Sanitizer. When I request 127:0.0.1:18080 in Edge browser, I get an Asan error.

Its caused by the request for “/favicon.ico” which seems to sometimes have whitespace (\x10 or \x13) at the end. For some reason this causes qs_parse() in query_string.h to cause an asan error on the calls to strcspn(). I bodged a fix by stripping whitespace from the end of url_ in the query_string constructor. Is this just an artefact of Microsoft’s Asan implementation. Any thought?