char *mail_root = notmuch_canonicalize_file_name (
g_key_file_get_string (key_file, "database", "mail_root", NULL));
char *db_path = notmuch_canonicalize_file_name (database_path);
char *mail_root = notmuch_canonicalize_file_name (
g_key_file_get_string (key_file, "database", "mail_root", NULL));
char *db_path = notmuch_canonicalize_file_name (database_path);