This issue tracks requests to provide source links to code-hosting sites.

We won't be pursuing a new go-source meta tag (#39559). Instead, we will add code to the internal/source package as needed.

Use this issue to request that we add a site. Your request can take a few different forms. In order of preference:

1. Write a CL. Examples: https://golang.org/cl/245379, https://golang.org/cl/245380. If the site requires more than just adding a pattern, describe your changes here first.

2. Provide the pattern and templates that should be added to the patterns variable in source.go, or describe the linking scheme if it doesn't fit our patterns.

3. Provide a link to a repo on the site. We'll determine the patterns.

No need to file a separate issue for your site; just comment here. An exception is the existing issue for launchpad.net: #39627.