Add a prefix argument option to filter read.
Add a prefix argument option to filter read.

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