freerds: update with FreeRDP channels branch
freerds: register WtsApi implementation
freerds: make use of WTSAPI for opening/closing server handle
freerds: update to make use of opaque HANDLE instead of WTSVirtualChannelManager*
Merge branch 'master' of github.com:awakecoding/FreeRDS into channels
Merge branch 'master' of github.com:awakecoding/FreeRDS into channels