Make many fields of X.509 structures public

The structures mbedtls_x509_time, mbedtls_x509_crl_entry, mbedtls_x509_crl,
mbedtls_x509_crt, mbedtls_x509_san_other_name,
mbedtls_x509_subject_alternative_name, mbedtls_x509_csr are designed to
expose the result of parsing X.509 data. Document many of their fields as
being publicly readable.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/include/mbedtls/x509_csr.h b/include/mbedtls/x509_csr.h
index 674f9ce..5d1ce0e 100644
--- a/include/mbedtls/x509_csr.h
+++ b/include/mbedtls/x509_csr.h
@@ -42,20 +42,24 @@
 
 /**
  * Certificate Signing Request (CSR) structure.
+ *
+ * Some fields of this structure are publicly readable. Do not modify
+ * them except via Mbed TLS library functions: the effect of modifying
+ * those fields or the data that those fields points to is unspecified.
  */
 typedef struct mbedtls_x509_csr
 {
-    mbedtls_x509_buf MBEDTLS_PRIVATE(raw);           /**< The raw CSR data (DER). */
-    mbedtls_x509_buf MBEDTLS_PRIVATE(cri);           /**< The raw CertificateRequestInfo body (DER). */
+    mbedtls_x509_buf raw;           /**< The raw CSR data (DER). */
+    mbedtls_x509_buf cri;           /**< The raw CertificateRequestInfo body (DER). */
 
-    int MBEDTLS_PRIVATE(version);            /**< CSR version (1=v1). */
+    int version;            /**< CSR version (1=v1). */
 
-    mbedtls_x509_buf  MBEDTLS_PRIVATE(subject_raw);  /**< The raw subject data (DER). */
-    mbedtls_x509_name MBEDTLS_PRIVATE(subject);      /**< The parsed subject data (named information object). */
+    mbedtls_x509_buf  subject_raw;  /**< The raw subject data (DER). */
+    mbedtls_x509_name subject;      /**< The parsed subject data (named information object). */
 
-    mbedtls_pk_context MBEDTLS_PRIVATE(pk);          /**< Container for the public key context. */
+    mbedtls_pk_context pk;          /**< Container for the public key context. */
 
-    mbedtls_x509_buf MBEDTLS_PRIVATE(sig_oid);
+    mbedtls_x509_buf sig_oid;
     mbedtls_x509_buf MBEDTLS_PRIVATE(sig);
     mbedtls_md_type_t MBEDTLS_PRIVATE(sig_md);       /**< Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 */
     mbedtls_pk_type_t MBEDTLS_PRIVATE(sig_pk);       /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA */