Revert "config: Remove X.509 options"

This reverts commit bb1f70121218b461a4197224d547e6bcfae4f991.

* include/mbedtls/check_config.h:
    * MBEDTLS_X509_RSASSA_PSS_SUPPORT: there has been an addition (of
      MBEDTLS_SHA512_NO_SHA384) at the place where it was removed.
      Re-add it before MBEDTLS_SHA512_NO_SHA384 to keep it grouped
      with MBEDTLS_RSA_C.

Conflicts:
* scripts/config.pl: this file has been replaced by config.py. Port
  the reversed changes to config.py:
    * Revert removing three symbols from the list of symbols to
      exclude from full.
diff --git a/configs/config-no-entropy.h b/configs/config-no-entropy.h
index 502ca03..433c663 100644
--- a/configs/config-no-entropy.h
+++ b/configs/config-no-entropy.h
@@ -51,6 +51,8 @@
 #define MBEDTLS_PKCS1_V21
 #define MBEDTLS_SELF_TEST
 #define MBEDTLS_VERSION_FEATURES
+#define MBEDTLS_X509_CHECK_KEY_USAGE
+#define MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE
 
 /* mbed TLS modules */
 #define MBEDTLS_AES_C
@@ -76,6 +78,9 @@
 #define MBEDTLS_SHA256_C
 #define MBEDTLS_SHA512_C
 #define MBEDTLS_VERSION_C
+#define MBEDTLS_X509_USE_C
+#define MBEDTLS_X509_CRT_PARSE_C
+#define MBEDTLS_X509_CRL_PARSE_C
 //#define MBEDTLS_CMAC_C
 
 /* Miscellaneous options */