static const char* oidc_util_hdr_in_get_left_most_only(const request_rec *r,
		const char *name, const char *separator) {
	char *last = NULL;
	const char *value = oidc_util_hdr_in_get(r, name);
	if (value)
		return apr_strtok(apr_pstrdup(r->pool, value), separator, &last);
	return NULL;
}
static const char* oidc_util_hdr_in_get_left_most_only(const request_rec *r,
		const char *name, const char *separator) {
	char *last = NULL;
	const char *value = oidc_util_hdr_in_get(r, name);
	if (value)
		return apr_strtok(apr_pstrdup(r->pool, value), separator, &last);
	return NULL;
}