Update spice-protocol to rev 29 via SR 839649
https://build.opensuse.org/request/show/839649
by user bfrogers + dimstar_suse
- Update to version 0.14.3
+ Add VD_AGENT_CLIPBOARD_FILE_LIST to support copy/paste of files with
WebDAV support
+ Add support for side mouse buttons
+ Add a MonitorsMM field to VDAgentMonitorsConfig allowing to pass
physical monitor dimension