Allow passing a flag to ‘elfeed-add-feed’ to save the new feed list.
Allow passing a flag to ‘elfeed-add-feed’ to save the new feed list.

The flag is always set when using the command interactively.

Also use ‘equal’ as the test predicate for ‘cl-pushnew’ as the list
contains strings.

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