Trying to send messages and ask subscription

Dependencies

• [2] 6G4QYIBF Update and try to send messages if recipient doesn't answer
• [3] UL67RM6X Re-implement sending message
• [*] TGO4TIWU Fix README

Change contents

• edit in src/xmpp/xmpp_connection.rs at line 1026
  [2.198]

  [2.198]
  + );

  + self.state.data.send_queue.extend(

  + mailbox

  + .drain(..)

  + .map(|message| stanzas::make_chat_message(message.1, message.0)),
• edit in src/xmpp/xmpp_connection.rs at line 1032
  [2.225]

  [2.225]
  + self.state.data.counter += 1;

  + let id_ask_subscribe =

  + format!("id_ask_subscribe{}", self.state.data.counter);
• replacement in src/xmpp/xmpp_connection.rs at line 1038
  [2.334]→[2.334:531](∅→∅)
  − .extend(mailbox.iter().map(|message| {

  − stanzas::make_chat_message(message.1.clone(), message.0.clone())

  − }));
  [2.334]

  [3.1934]
  + .push_back(stanzas::make_ask_subscribe(

  + id_ask_subscribe,

  + xmpp_to.clone().into(),

  + ));