Add an additional VHDAccessMode option that will allow new sessions to take over R/W control of the VHD
In cases where a Session Host or VDI VM hangs or becomes inaccessible we would like the users to be able to log into a new session host and have it take over R/W control of the VHD. It could create an unlock flag with security token or send a command to the system that has the existing lock to have it try to close its connection gracefully, but if nothing happens in, say, 30 seconds then any changes made on the other system are forfeited and the new system will have full control of the user’s VHD. This feature can be enabled or disabled by way of policy configuration.
