Source: Remove ignore_etags option

This is never used anywhere else apart from the testsuite. Instead
of ignoring etags we should instead not save them if the feed does
not return 200 or 304. See #64.

podcasts-gtk/src/manager.rs

@@ -133,7 +133,7 @@ mod tests {
         let source = Source::from_url(url).unwrap();
         // Copy its id
         let sid = source.id();
-        pipeline::run(vec![source], true).unwrap();
+        pipeline::run(vec![source]).unwrap();
 
         // Get the podcast
         let pd = dbqueries::get_podcast_from_source_id(sid).unwrap();
@@ -164,7 +164,7 @@ mod tests {
         let source = Source::from_url(url).unwrap();
         // Copy its id
         let sid = source.id();
-        pipeline::run(vec![source], true).unwrap();
+        pipeline::run(vec![source]).unwrap();
 
         // Get the podcast
         let pd = dbqueries::get_podcast_from_source_id(sid).unwrap();

podcasts-gtk/src/utils.rs

@@ -205,7 +205,7 @@ where
     rayon::spawn(move || {
         if let Some(s) = source {
             // Refresh only specified feeds
-            pipeline::run(s, false)
+            pipeline::run(s)
                 .map_err(|err| error!("Error: {}", err))
                 .map_err(|_| error!("Error while trying to update the database."))
                 .ok();
@@ -213,7 +213,7 @@ where
             // Refresh all the feeds
             dbqueries::get_sources()
                 .map(|s| s.into_iter())
-                .and_then(|s| pipeline::run(s, false))
+                .and_then(pipeline::run)
                 .map_err(|err| error!("Error: {}", err))
                 .ok();
         };