Add an external proxy to bypass great firewall

Signed-off-by: Chengwei Yang <yangchengwei@qiyi.com>
git --no-pager

Signed-off-by: Chengwei Yang <yangchengwei@qiyi.com>
Revert "Add an external proxy to bypass great firewall"

This reverts commit f20c81341789606aa309721203d1f2bc31cec92e.

Do not use the proxy currently