MINOR: ssl: free bind_conf_node in crtlist_free()

Free the list of bind_conf using a crt-list in crtlist_free()
diff --git a/src/ssl_crtlist.c b/src/ssl_crtlist.c
index 266949e..0fbd3f0 100644
--- a/src/ssl_crtlist.c
+++ b/src/ssl_crtlist.c
@@ -148,10 +148,18 @@
 void crtlist_free(struct crtlist *crtlist)
 {
 	struct crtlist_entry *entry, *s_entry;
+	struct bind_conf_list *bind_conf_node;
 
 	if (crtlist == NULL)
 		return;
 
+	bind_conf_node = crtlist->bind_conf;
+	while (bind_conf_node) {
+		struct bind_conf_list *next = bind_conf_node->next;
+		free(bind_conf_node);
+		bind_conf_node = next;
+	}
+
 	list_for_each_entry_safe(entry, s_entry, &crtlist->ord_entries, by_crtlist) {
 		crtlist_entry_free(entry);
 	}