Add error condition for bad user configurations

This commit adds an error condition for bad user configurations
and updates the number of SSL module errors in error.h.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/include/mbedtls/error.h b/include/mbedtls/error.h
index 2fb86c7..4288001 100644
--- a/include/mbedtls/error.h
+++ b/include/mbedtls/error.h
@@ -101,7 +101,7 @@
  * ECP       4   10 (Started from top)
  * MD        5   5
  * HKDF      5   1 (Started from top)
- * SSL       5   1 (Started from 0x5F00)
+ * SSL       5   2 (Started from 0x5F00)
  * CIPHER    6   8 (Started from 0x6080)
  * SSL       6   24 (Started from top, plus 0x6000)
  * SSL       7   32