1Bugfix
2   * Failures of alternative implementations of AES or DES single-block
3     functions enabled with MBEDTLS_AES_ENCRYPT_ALT, MBEDTLS_AES_DECRYPT_ALT,
4     MBEDTLS_DES_CRYPT_ECB_ALT or MBEDTLS_DES3_CRYPT_ECB_ALT were ignored.
5     This does not concern the implementation provided with Mbed TLS,
6     where this function cannot fail, or full-module replacements with
7     MBEDTLS_AES_ALT or MBEDTLS_DES_ALT. Reported by Armelle Duboc in #1092.
8
9Features
10   * Warn if errors from certain functions are ignored. This is currently
11     supported on GCC-like compilers and on MSVC and can be configured through
12     the macro MBEDTLS_CHECK_RETURN. The warnings are always enabled
13     (where supported) for critical functions where ignoring the return
14     value is almost always a bug. Enable the new configuration option
15     MBEDTLS_CHECK_RETURN_WARNING to get warnings for other functions. This
16     is currently implemented in the AES and DES modules, and will be extended
17     to other modules in the future.
18