Use multiple and per-user `DistributionListUrl`s

[conioh]

Is your feature request related to a problem? Please describe.

1. I want to use additional distribution sources. I am not an admin. Everything else I do with WSL doesn't require administrative privileges and doesn't affect global state and suddenly this does.

2. I want to use multiple additional distribution sources. I can't. I can either replace the Microsoft official source or add a single additional source.

Describe the solution you'd like

1. I want WSL to consider HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Lxss and not only the same path under HKEY_LOCAL_MACHINE.

2. DistributionListUrlAppend should be REG_MULTI_SZ and WSL should consider the multiple sources that may appear there.

Describe alternatives you've considered

For the first issue - there aren't any. For the second issue, a workaround might be to create a local server that generates a combined JSON on the fly.

Additional context

See also #13099 for another improvement request regarding the distribution lists.

[github-actions[bot]]

Logs are required for review from WSL team

If this a feature request, please reply with '/feature'. If this is a question, reply with '/question'. Otherwise please attach logs by following the instructions below, your issue will not be reviewed unless they are added. These logs will help us understand what is going on in your machine.

How to collect WSL logs

Download and execute collect-wsl-logs.ps1 in an administrative powershell prompt:

Invoke-WebRequest -UseBasicParsing "https://raw.githubusercontent.com/microsoft/WSL/master/diagnostics/collect-wsl-logs.ps1" -OutFile collect-wsl-logs.ps1
Set-ExecutionPolicy Bypass -Scope Process -Force
.\collect-wsl-logs.ps1

The script will output the path of the log file once done.

If this is a networking issue, please use collect-networking-logs.ps1, following the instructions here

Once completed please upload the output files to this Github issue.

Click here for more info on logging If you choose to email these logs instead of attaching to the bug, please send them to [email protected] with the number of the github issue in the subject, and in the message a link to your comment in the github issue and reply with '/emailed-logs'.

[conioh]

/feature

[github-actions[bot]]

Diagnostic information

Found '/feature', adding tag 'feature'