On windows, display spice-app is not able to initialize, start spice-server and consequently can't use spice-client
Description of problem:
I want to try windows spice-client / virt-viewer.exe (v11.0.256) instead of gtk client.  
Windows spice client virtviewer won't start like it does under Linux.  
The error message indicaes that the spice-server itself failed to open spice sockets
The registry to handle ```spice://``` URI handler is configured.
Steps to reproduce:
1. just run command
Additional information:
URI handler in registry is configure using a regestry import file ```spiceproto.reg```
```
Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\spice]
"URL Protocol"=""

[HKEY_CLASSES_ROOT\spice\DefaultIcon]
@="C:\\Program Files\\VirtViewer v11.0-256\\bin\\remote-viewer.exe,1"

[HKEY_CLASSES_ROOT\spice\Extensions]
[HKEY_CLASSES_ROOT\spice\shell]
[HKEY_CLASSES_ROOT\spice\shell\open]
[HKEY_CLASSES_ROOT\spice\shell\open\command] 
@="\"C:\\Program Files\\VirtViewer v11.0-256\\bin\\remote-viewer.exe\" \"%1\""

[HKEY_CLASSES_ROOT\spice+unix]
"URL Protocol"=""

[HKEY_CLASSES_ROOT\spice+unix\DefaultIcon]
@="C:\\Program Files\\VirtViewer v11.0-256\\bin\\remote-viewer.exe,1"

[HKEY_CLASSES_ROOT\spice+unix\Extensions]
[HKEY_CLASSES_ROOT\spice+unix\shell]
[HKEY_CLASSES_ROOT\spice+unix\shell\open]
[HKEY_CLASSES_ROOT\spice+unix\shell\open\command] 
@="\"C:\\Program Files\\VirtViewer v11.0-256\\bin\\remote-viewer.exe\" \"%1\""
```
This URI handler is working, and can be seen to work by typing ```spice://abcdefg``` in firefox.