Bug 475878

SUMMARY
Krdc doesn't pass the full username to xfreerdp. If the username contains two backslashes, it only passes the part between them. This effectively makes it impossible to connect to a computer using a Microsoft account with krdc.

STEPS TO REPRODUCE
1. Enter a host to connect to and click "go to address"
2. Set up needed parameters for the connection (including at least adding "/sec:tls" as an additional option, and removing the "/media" that krdc always wants to mount even though it doesn't exist), and click OK.
3. Enter the username (for a computer using Microsoft account for authentication this is ".\AzureAD\<e-mail address>")
4. Enter password

OBSERVED RESULT
krdc launches an xfreerdp process with "/u:AzureAD" as a parameter, meaning is throws away part of the username.

EXPECTED RESULT
krdc launches an xfreerdp process with "/u:.\AzureAD\<e-mail address>"

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20231018
KDE Plasma Version: 5.27.8
KDE Frameworks Version: 5.110.0
Qt Version: 5.15.11
Kernel Version: 6.5.6-1-default (64-bit)
Graphics Platform: X11
Processors: 16 × AMD Ryzen 7 5800X 8-Core Processor
Memory: 62.7 Gibyte of RAM
Graphics Processor: NVIDIA GeForce RTX 2080 Ti/PCIe/SSE2
Manufacturer: ASUS