support to download pkgs from sftp server #38
Description
Is your feature request related to a problem? Please describe.（如果该特性或者功能和已知某个问题相关，请描述问题是什么）
support to download pkgs from sftp server. (Mirror to speed up)
Describe the solution you'd like（问题的解决办法是什么）
No response
Describe alternatives you've considered（描述您考虑过的替代方案）
No response
Additional context（其他补充内容）
No response