Always add a 210 status in our self join presence

Because it's much much simpler than to track if we changed the nick that
was requested in the join request. And client will probably not get confused,
I hope.

src/xmpp/xmpp_component.cpp

@@ -340,8 +340,10 @@ void XmppComponent::send_user_join(const std::string& from,
 
     if (self)
       {
-        XmlSubNode status(x, "status");
-        status["code"] = "110";
+        XmlSubNode status_self(x, "status");
+        status_self["code"] = "110";
+        XmlSubNode status_nick_modified(x, "status");
+        status_nick_modified["code"] = "210";
       }
   }
   this->send_stanza(presence);