add linphone_core_clear_frlend_lists api and use it when reading bodyless config

coreapi/linphonecore.c

@@ -1340,6 +1340,9 @@ static void certificates_config_read(LinphoneCore *lc) {
 }
 
 static void bodyless_config_read(LinphoneCore *lc) {
+	// Clean previous friend lists
+	linphone_core_clear_friend_lists(lc);
+
 	bctbx_list_t *bodyless_lists = linphone_config_get_string_list(lc->config, "sip", "bodyless_lists", NULL);
 	while (bodyless_lists) {
 		char *name = (char *)bodyless_lists->data;
@@ -2773,6 +2776,15 @@ void linphone_core_remove_friend_list(LinphoneCore *lc, LinphoneFriendList *list
 	lc->friends_lists = bctbx_list_erase_link(lc->friends_lists, elem);
 }
 
+void linphone_core_clear_friend_lists(LinphoneCore *lc) {
+	bctbx_list_t* list = bctbx_list_copy(linphone_core_get_friends_lists((const LinphoneCore *)lc));
+	bctbx_list_t* copy = list;
+	for (; list != NULL; list = list->next) {
+		linphone_core_remove_friend_list(lc, (LinphoneFriendList *)list->data);
+	}
+	bctbx_list_free(copy);
+}
+
 void linphone_core_add_friend_list(LinphoneCore *lc, LinphoneFriendList *list) {
 	if (!list->lc) {
 		list->lc = lc;

include/linphone/core.h

@@ -5520,6 +5520,12 @@ LINPHONE_PUBLIC void linphone_core_add_friend_list(LinphoneCore *lc, LinphoneFri
  */
 LINPHONE_PUBLIC void linphone_core_remove_friend_list(LinphoneCore *lc, LinphoneFriendList *list);
 
+/**
+ * Removes all friend lists.
+ * @param[in] lc #LinphoneCore object
+ */
+LINPHONE_PUBLIC void linphone_core_clear_friend_lists(LinphoneCore *lc);
+
 /**
  * Retrieves the list of #LinphoneFriendList from the core.
  * @param[in] lc #LinphoneCore object