Don't allow slashes in webid strings (#172).
Don't allow slashes in webid strings (#172).

It's just a base64 encoding, so change them to dashes instead.

emacsmirror/elfeed,seblemaguer/elfeed,skeeto/elfeed,holomorph/elfeed,skeeto/elfeed,seblemaguer/elfeed,emacsmirror/elfeed,holomorph/elfeed