Fix a bunch of obvious memory leaks at termination

Signed-off-by: Steffen Jaeckel <s@jaeckel.eu>

src/xmpp/connection.c

@@ -167,6 +167,8 @@ void
 connection_shutdown(void)
 {
     connection_clear_data();
+    g_hash_table_destroy(conn.requested_features);
+    g_hash_table_destroy(conn.available_resources);
     if (conn.xmpp_conn) {
         xmpp_conn_release(conn.xmpp_conn);
         conn.xmpp_conn = NULL;

src/xmpp/presence.c

@@ -83,6 +83,12 @@ presence_sub_requests_init(void)
     sub_requests_ac = autocomplete_new();
 }
 
+void
+presence_sub_requests_destroy(void)
+{
+    autocomplete_free(sub_requests_ac);
+}
+
 void
 presence_handlers_init(void)
 {

src/xmpp/presence.h

@@ -38,6 +38,7 @@
 
 void presence_handlers_init(void);
 void presence_sub_requests_init(void);
+void presence_sub_requests_destroy(void);
 void presence_clear_sub_requests(void);
 
 #endif

src/xmpp/session.c

@@ -233,7 +233,7 @@ session_shutdown(void)
     _session_free_internals();
 
     chat_sessions_clear();
-    presence_clear_sub_requests();
+    presence_sub_requests_destroy();
 
     connection_shutdown();
     if (saved_status) {