fix #29 : envoyer le lien magique par email (envoyer_mail_smtp)

database/migration_005_rss_feeds.sql

@@ -0,0 +1,8 @@
+CREATE TABLE IF NOT EXISTS rss_feeds (
+    id         SERIAL PRIMARY KEY,
+    user_email TEXT NOT NULL,
+    feed_url   TEXT NOT NULL,
+    label      TEXT NOT NULL DEFAULT '',
+    created_at TIMESTAMP DEFAULT now(),
+    UNIQUE (user_email, feed_url)
+);