GHSA-X7VR-C387-8W57 Integer Overflow/Infinite Loop in the http crate

HeaderMap::reserve used usize::nextpoweroftwo to calculate the increased capacity. However, nextpoweroftwo silently overflows to 0 if given a sufficiently large number in release mode. If the map was not empty when the overflow happens, the library will invoke self.grow0 and start infinite probin...