new value for "cable connected" setting: follow host

[mikewse]

When using network with a Bridged Adapter it can be desirable to have the guest VMs get their virtual network cable "disconnected" automatically when the host's physical network cable is disconnected. F ex, when using a laptop and moving around among subnets this would automatically update DHCP addresses in the guests. Currently this has to be done by manually triggering release/renew in the guests.

This behaviour could be configurable by making the setting:

• Network > Adapter X (Bridged) > Advanced > Cable connected

have three values:

• Connected
  Disconnected
  Host (follow physical cable)

[Sasquatch]

It's placed better in the Bugtracker (separate account needed).

One thing you have to keep in mind, the third option may only work and be used when you use Bridged Networking. If you switch the setting during VM run time, the default "connected" should be set.
Also, it needs quite a lot of code change. It's now a boolean value, which means that the only values are 'true' and 'false'. With a third option, an additional check must be made and changes to the GUI too. The idea is simple, execution isn't.