Run without admin privileges

[bitching]

using netsh to set static ip requires privilege elevation, but this can be avoid by using dhcp.
this helps those one who doesn't want to modify route tables.

See:
https://github.com/yinghuocho/gotun2socks/blob/master/tun/tun_windows.go#L161

[FlowerWrong]

Good idea. Can you mention a PR? And add some note about administrator privilege on windows here

[bitching]

I can barely read some codes(not much), and not able to produce them, which is embarrassing.

[bitching]

and i think putting the list outside the config file maybe more graceful.
this can archive a hot reload without making the tap adapter down.
this idea relies your future work.
btw, whether you can improve this or not, it's the best transparent proxy program i have seen.(for windows)
thanks for your working!