internal/source: support git.glasklar.is URLs

Fixes #69638

Change-Id: I9b595bcc98d2d92895ad3d626981aa551ce75d07
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/609535
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Michael Knyszek <[email protected]>
TryBot-Bypass: Jonathan Amsterdam <[email protected]>
Reviewed-by: Jonathan Amsterdam <[email protected]>

Author: gregoire-mullvad

internal/source/source.go

@@ -667,6 +667,10 @@ var patterns = []struct {
 		pattern:   `^(?P<repo>git\.pirl\.io/[a-z0-9A-Z_.\-]+/[a-z0-9A-Z_.\-]+)`,
 		templates: gitlabURLTemplates,
 	},
+	{
+		pattern:   `^(?P<repo>git\.glasklar\.is/[a-z0-9A-Z_.\-]+/[a-z0-9A-Z_.\-]+)`,
+		templates: gitlabURLTemplates,
+	},
 	{
 		pattern:         `^(?P<repo>gitea\.com/[a-z0-9A-Z_.\-]+/[a-z0-9A-Z_.\-]+)(\.git|$)`,
 		templates:       giteaURLTemplates,