* Add HTTP POST support
* Add expires handling for Cookie
* Add SSL server cert verification
* Add SSL client cert support
* Better HTTP status handling
* Download files listed in a specifed file.
* Add the feature which adds or removes URLs on-the-fly.
* no-compact peers format
* Add port range command-line option
* Add max peers command-line option
* Refacturing HttpConnection and FtpConnection
* Query resource by location
* List available os, version, etc for metalink
* ipv6(RFC2428 for ftp)
* Add silent mode.
* Add NOTIFY log level. A message categorized in this level is printed in
a console along with a log file.
