Add link header to elfeed-show-mode.
Add link header to elfeed-show-mode.

abo-abo/elfeed,skeeto/elfeed,holomorph/elfeed,algernon/elfeed,jinnovation/elfeed,emacsmirror/elfeed,skeeto/elfeed,seblemaguer/elfeed,holomorph/elfeed,algernon/elfeed,daimrod/elfeed,seblemaguer/elfeed,jinnovation/elfeed,emacsmirror/elfeed,daimrod/elfeed