Build 20190

For general Windows information on build 20190 visit the Windows blog.

• Fix bug preventing WSL1 instances from launching [GH 5633]
• Fix hang when redirecting Windows process output [GH 5648]
• Add %userprofile%\.wslconfig option to control the VM idle timeout (wsl2.vmIdleTimeout=<time_in_ms>)
• Support launching app execution aliases from WSL
• Added support for installing the WSL2 kernel and distributions to wsl.exe --install