Document that RSA public exponent must be odd
@@ -433,6 +433,7 @@ size_t mbedtls_rsa_get_len( const mbedtls_rsa_context *ctx );
* This may be \c NULL if \p f_rng doesn't need a context.
* \param nbits The size of the public key in bits.
* \param exponent The public exponent to use. For example, \c 65537.
+ * This must be odd.
*
* \return \c 0 on success.
* \return An \c MBEDTLS_ERR_RSA_XXX error code on failure.
