XmlNodes are now always closed

Remove the close() method and closed attribute. Remove all the calls to
close().  (Save one bool per XmlNode, yay, and save a few ifs and some
useless function calls. At best it should be unnoticeably faster and lighter
and save a few keystrokes in the future)

src/xmpp/biboumi_adhoc_commands.cpp

@@ -10,18 +10,15 @@ void DisconnectUserStep1(XmppComponent* xmpp_component, AdhocSession&, XmlNode&
   x["type"] = "form";
   XmlNode title("title");
   title.set_inner("Disconnect a user from the gateway");
-  title.close();
   x.add_child(std::move(title));
   XmlNode instructions("instructions");
   instructions.set_inner("Choose a user JID and a quit message");
-  instructions.close();
   x.add_child(std::move(instructions));
   XmlNode jids_field("field");
   jids_field["var"] = "jids";
   jids_field["type"] = "list-multi";
   jids_field["label"] = "The JIDs to disconnect";
   XmlNode required("required");
-  required.close();
   jids_field.add_child(std::move(required));
   for (Bridge* bridge: biboumi_component->get_bridges())
     {
@@ -29,12 +26,9 @@ void DisconnectUserStep1(XmppComponent* xmpp_component, AdhocSession&, XmlNode&
       option["label"] = bridge->get_jid();
       XmlNode value("value");
       value.set_inner(bridge->get_jid());
-      value.close();
       option.add_child(std::move(value));
-      option.close();
       jids_field.add_child(std::move(option));
     }
-  jids_field.close();
   x.add_child(std::move(jids_field));
 
   XmlNode message_field("field");
@@ -43,11 +37,8 @@ void DisconnectUserStep1(XmppComponent* xmpp_component, AdhocSession&, XmlNode&
   message_field["label"] = "Quit message";
   XmlNode message_value("value");
   message_value.set_inner("Disconnected by admin");
-  message_value.close();
   message_field.add_child(std::move(message_value));
-  message_field.close();
   x.add_child(std::move(message_field));
-  x.close();
   command_node.add_child(std::move(x));
 }
 
@@ -95,7 +86,6 @@ void DisconnectUserStep2(XmppComponent* xmpp_component, AdhocSession& session, X
             note.set_inner("1 user has been disconnected.");
           else
             note.set_inner(std::to_string(num) + " users have been disconnected.");
-          note.close();
           command_node.add_child(std::move(note));
           return;
         }
@@ -103,9 +93,7 @@ void DisconnectUserStep2(XmppComponent* xmpp_component, AdhocSession& session, X
   XmlNode error(ADHOC_NS":error");
   error["type"] = "modify";
   XmlNode condition(STANZA_NS":bad-request");
-  condition.close();
   error.add_child(std::move(condition));
-  error.close();
   command_node.add_child(std::move(error));
   session.terminate();
 }

src/xmpp/biboumi_component.cpp

@@ -321,7 +321,6 @@ void BiboumiComponent::handle_iq(const Stanza& stanza)
           else
             response["type"] = "result";
           response.add_child(std::move(inner_node));
-          response.close();
           this->send_stanza(response);
           stanza_error.disable();
         }
@@ -494,18 +493,14 @@ void BiboumiComponent::send_self_disco_info(const std::string& id, const std::st
   identity["category"] = "conference";
   identity["type"] = "irc";
   identity["name"] = "Biboumi XMPP-IRC gateway";
-  identity.close();
   query.add_child(std::move(identity));
   for (const std::string& ns: {DISCO_INFO_NS, MUC_NS, ADHOC_NS})
     {
       XmlNode feature("feature");
       feature["var"] = ns;
-      feature.close();
       query.add_child(std::move(feature));
     }
-  query.close();
   iq.add_child(std::move(query));
-  iq.close();
   this->send_stanza(iq);
 }
 
@@ -519,9 +514,7 @@ void BiboumiComponent::send_iq_version_request(const std::string& from,
   iq["to"] = jid_to;
   XmlNode query("query");
   query["xmlns"] = VERSION_NS;
-  query.close();
   iq.add_child(std::move(query));
-  iq.close();
   this->send_stanza(iq);
 }
 
@@ -536,9 +529,7 @@ void BiboumiComponent::send_ping_request(const std::string& from,
   iq["to"] = jid_to;
   XmlNode ping("ping");
   ping["xmlns"] = PING_NS;
-  ping.close();
   iq.add_child(std::move(ping));
-  iq.close();
   this->send_stanza(iq);
 
   auto result_cb = [from, id](Bridge* bridge, const Stanza& stanza)
@@ -571,11 +562,8 @@ void BiboumiComponent::send_iq_room_list_result(const std::string& id,
     {
       XmlNode item("item");
       item["jid"] = room.channel + "%" + from + "@" + this->served_hostname;
-      item.close();
       query.add_child(std::move(item));
     }
-  query.close();
   iq.add_child(std::move(query));
-  iq.close();
   this->send_stanza(iq);
 }