Fix comment on resumption
diff --git a/include/polarssl/ssl.h b/include/polarssl/ssl.h
index 219060d..a4cd70e 100644
--- a/include/polarssl/ssl.h
+++ b/include/polarssl/ssl.h
@@ -1027,7 +1027,8 @@
#if defined(POLARSSL_SSL_SRV_C)
/**
* \brief Set the session cache callbacks (server-side only)
- * If not set, no session resuming is done.
+ * If not set, no session resuming is done (except if session
+ * tickets are enabled too).
*
* The session cache has the responsibility to check for stale
* entries based on timeout. See RFC 5246 for recommendations.