[winswitch] [ANNOUNCE] Xpra HTML5 4.5.1

[Antoine Martin]

Hi,

There are only three changes in this release:
* a workaround for a Firefox bug in the image decoder which was causing 
some windows to show up blank
* allow AES and SSL to be combined - for those that need it
* support multiple authentication challenge responses as parameters

The full release notes can be found here:
https://github.com/Xpra-org/xpra-html5/releases/tag/v4.5.1

Cheers
Antoine