Disable muc history when joining an muc since we now have muc mam

see #660

Author: MarcoPolo-PasTonMolo

src/xmpp/stanza.c

@@ -552,6 +552,11 @@ stanza_create_room_join_presence(xmpp_ctx_t* const ctx,
     xmpp_stanza_set_name(x, STANZA_NAME_X);
     xmpp_stanza_set_ns(x, STANZA_NS_MUC);
 
+    // Disable muc history
+    xmpp_stanza_t* history = xmpp_stanza_new(ctx);
+    xmpp_stanza_set_name(history, STANZA_NAME_HISTORY);
+    xmpp_stanza_set_attribute(history, "maxchars", "0");
+
     if (passwd) {
         xmpp_stanza_t* pass = xmpp_stanza_new(ctx);
         xmpp_stanza_set_name(pass, "password");
@@ -563,7 +568,9 @@ stanza_create_room_join_presence(xmpp_ctx_t* const ctx,
         xmpp_stanza_release(pass);
     }
 
+    xmpp_stanza_add_child(x, history);
     xmpp_stanza_add_child(presence, x);
+    xmpp_stanza_release(history);
     xmpp_stanza_release(x);
 
     return presence;

src/xmpp/stanza.h

@@ -56,6 +56,7 @@
 #define STANZA_NAME_PRESENCE  "presence"
 #define STANZA_NAME_PRIORITY  "priority"
 #define STANZA_NAME_X         "x"
+#define STANZA_NAME_HISTORY   "history"
 // XEP-0373: OpenPGP for XMPP
 #define STANZA_NAME_OPENPGP          "openpgp"
 #define STANZA_NAME_PUPKEY           "pubkey"