Xpra: Ticket #1804: full-length domain user names not interpreted correctly on ssh login

Let's assume that server frodo has been joined to a domain and requires usernames in full-length format like

user@domain.x.

When using the xpra start format for ssh like

xpra start ssh:user@domain.x@frodo:17 --start=xterm

, Xpra is trying to establish connection for

user@frodo

instead of
user@domain.x@frodo

This makes it impossible to use command-line definition of usernames in this case.

Does r18994 fix things?

This fix seems to work.