Update go-sendxmpp to version 0.8.1 / rev 10 via SR 1139338
https://build.opensuse.org/request/show/1139338
by user jubalh + anag+factory
- Update to 0.8.1:
* Add support for tls-server-end-point channel binding
* Add experimental support for SOCKS5 proxies using the HTTP_PROXY
environment variable
* http-upload: Improved error handling.