purple: Add a way to access the account password

src/purple/loader.rs

@@ -39,6 +39,17 @@ impl<P> RegisterContext<P> {
         self.info.actions = Some(entrypoints::actions);
         self
     }
+
+    pub fn with_password(mut self) -> Self {
+        // purple_sys defaults extra_info.options to contain:
+        // OPT_PROTO_NO_PASSWORD | OPT_PROTO_IM_IMAGE | OPT_PROTO_CHAT_TOPIC
+        // All we have to do is remove the no_password one.
+        self.extra_info.options =
+          purple_sys::PurpleProtocolOptions::OPT_PROTO_IM_IMAGE |
+          purple_sys::PurpleProtocolOptions::OPT_PROTO_CHAT_TOPIC;
+
+        self
+    }
 }
 
 pub struct PrplPluginLoader<P: PrplPlugin>(*mut purple_sys::PurplePlugin, PhantomData<P>);