- new options in network section: onionsocksproxytype,
onionsockshostname and onionsocksport. These allow to separate
connectivity types for onion and non-onion addresses, e.g. connect to
clear nodes over clearnet and onions over tor
- also remove some obsolete imports
- finished proxy design
- socks4a and socks5 implemented
- authentication not tested
- resolver for both socks4a and socks5
- http client example using the proxy
