list absolute links

[oupala]

The plugin is listing relative broken links on the console.

Feature request : it would be great to allow listing (and writing to file) absolute link (broken or not, we can't tell as they are not currently checked), so that it is still possible to check absolute links afterward, using another tool (might be curl or wget, used manually).

[oupala]

With this enhancement, the module could generate a list of external links. We could then use linkchecker to check if all external links are valid or not.