Create error code for mbedtls_ssl_set_hostname not called

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/include/mbedtls/error.h b/include/mbedtls/error.h
index 186589a..635f7cd 100644
--- a/include/mbedtls/error.h
+++ b/include/mbedtls/error.h
@@ -81,7 +81,7 @@
  * MD        5   5
  * HKDF      5   1 (Started from top)
  * PKCS7     5   12 (Started from 0x5300)
- * SSL       5   2 (Started from 0x5F00)
+ * SSL       5   3 (Started from 0x5F00)
  * CIPHER    6   8 (Started from 0x6080)
  * SSL       6   22 (Started from top, plus 0x6000)
  * SSL       7   20 (Started from 0x7000, gaps at