Add note about not implementing PSK id_hint
diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index 6b5b461..6bd0b59 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -2718,7 +2718,8 @@
     if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK ||
         ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
     {
-        /* TODO: Support identity hints */
+        /* Note: we don't support identity hints, until someone asks
+         * for them. */
         *(p++) = 0x00;
         *(p++) = 0x00;