Increase If-Modified-Since tolerance even more (#169)

Signed-off-by: Juan Cruz Viotti <[email protected]>

src/httpserver/request.cc

@@ -73,7 +73,7 @@ auto ServerRequest::header_if_modified_since(
 
     // Time comparison can be flaky, but adding a bit of tolerance leads
     // to more consistent behavior.
-    return (if_modified_since.value() + std::chrono::milliseconds(1)) <
+    return (if_modified_since.value() + std::chrono::seconds(1)) <
            last_modified;
     // If there is an error parsing the `If-Modified-Since` timestamp, don't
     // abort, but lean on the safe side: the requested resource has been