Add /rooms cache

tests/unittests/ui/stub_ui.c

@@ -445,6 +445,7 @@ void cons_autoaway_setting(void) {}
 void cons_reconnect_setting(void) {}
 void cons_autoping_setting(void) {}
 void cons_autoconnect_setting(void) {}
+void cons_rooms_cache_setting(void) {}
 void cons_inpblock_setting(void) {}
 void cons_winpos_setting(void) {}
 void cons_tray_setting(void) {}

tests/unittests/xmpp/stub_xmpp.c

@@ -204,6 +204,7 @@ void iq_room_role_set(const char * const room, const char * const nick, char *ro
 void iq_room_role_list(const char * const room, char *role) {}
 void iq_last_activity_request(gchar *jid) {}
 void iq_autoping_check(void) {}
+void iq_rooms_cache_clear(void) {}
 
 // caps functions
 void caps_add_feature(char *feature) {}