Revert "add socks5 support"

This reverts commit d8150feeaf08d8a186d3e11400e0360b102f1110.

Conflicts:
	.gitignore
	src/ibrowse_http_client.erl
	src/ibrowse_socks5.erl
Add SOCKS5 Support

Supports HTTP and HTTPS destinations and performs all hostname
resolution via the SOCKS proxy, preventing privacy leakage if used
with Tor.

If hostname is a valid IP address then it is used directly, the
hostname is not resolved again via the SOCKS5 proxy (Patch suggested
by Klaus Trainer but implementation here slightly different).
Merge pull request #117 from rnewson/socks5-redux

Enhanced SOCKS5 Support