bitsearch: add prefer magnet links

src/Jackett.Common/Definitions/bitsearch.yml

@@ -58,6 +58,10 @@ caps:
     book-search: [q]
 
 settings:
+  - name: prefer_magnet_links
+    type: checkbox
+    label: Prefer Magnet Links
+    default: false
   - name: sort
     type: select
     label: Sort requested from site
@@ -100,9 +104,16 @@ search:
     details:
       selector: h5 a
       attribute: href
-    download:
+    download_optional:
       selector: a.dl-torrent
       attribute: href
+      optional: true
+    download:
+      text: "{{ if .Config.prefer_magnet_links }}{{ else }}{{ .Result.download_optional }}{{ end }}"
+      optional: true
+    magnet:
+      selector: a[href^="magnet:?xt"]
+      attribute: href
     infohash:
       selector: a[href^="magnet:?xt"]
       attribute: href