Network command prompt to optimize

[aspnetdb]

Issue Description

feature request

Describe what happened (or what feature you want)

Network command prompt to optimize. After change the port command will be easier to understand.

invoke-port change to foreign-port
service-port change to local-port

blade create network delay --invoke-port 9527 --time 5000 --device eth0

      --invoke-port string    Port for invoke
      --offset string         Delay offset time, ms
      --service-port string   Port for external service

[xcaspar]

Agree, --local-port and --foreign-port are more able to express the port to be drilled than --invoke-port and --service-port. We will add this change to the next version.