New Name for this project

[wzshiming]

Change the name because it is the same name as the bridge of linux

[wzshiming]

• nb (Net Bridge)
• np (Net Proxy)
• nt (Net Tunnel) - Focused on being a net tunneling machine 😄
• snc (Supper Net Cat) - This project could be a superset of nc(NetCat)
• tc (TunCat, Tunnel Cat)