[boost] Boost.URL Proposal max_size

Hi! We're deciding on the max size for URLs in our Boost.URL proposal. The spec doesn't suggest a limit but the reasonable trade-off https://stackoverflow.com/questions/417142/what-is-the-maximum-length-of-a-u... is: - 2^16 chars: More than all browsers, servers, and search engines support (~2000 chars). More than the HTTP minimum of 8000 octets. - 2^32 chars: "414 Too long request" in practice everywhere. Maybe supports experiments using URLs as a container for something else. Any suggestions? -- Alan Freitas https://github.com/alandefreitas