- Fix the bug with URIs of the form ftp://host/filename.
- Fix some more string-termination bugs in util.c.
- Use safe_malloc() rather than testing the return value of
regular malloc() in 15 places.
- Implement HTTP authentication, for both servers and proxies.
Currently only ``basic'' authentication is supported; This Is A Bug
(but less of one tjhan nmot supporting any authentication).
I think there is only one more feature which is required for full
HTTP/1.1 support, which is Transfer-Encoding: chunked; this should
not be toohard, but it isn't very important, either.