superbits: add search P2P releases only option (#14670)

src/Jackett.Common/Definitions/superbits.yml

@@ -58,6 +58,10 @@ settings:
     type: checkbox
     label: Search freeleech only
     default: false
+  - name: p2p_releases_only
+    type: checkbox
+    label: Search P2P releases only
+    default: false
   - name: sort
     type: select
     label: Sort requested from site
@@ -102,6 +106,7 @@ search:
     noaudio: false
     nosub: false
     order: "{{ .Config.type }}"
+    p2p: "{{ if .Config.p2p_releases_only }}true{{ else }}{{ end }}"
     page: search
     searchText: "{{ if .Query.IMDBID }}{{ .Query.IMDBID }} {{ else }}{{ end }}{{ .Keywords }}"
     section: all