Tidied up style and phrasing of ChangeLog

ChangeLog

@@ -3,14 +3,15 @@ mbed TLS ChangeLog (Sorted per branch, date)
 = mbed TLS 2.3.x branch released 2016-xx-xx
 
 Security
-   * Remove MBEDTLS_SSL_AEAD_RANDOM_IV option, because it was not compliant
-     with RFC5116 and could lead to session key recovery in very long TLS
-     sessions. (H. Bock, A. Zauner, S. Devlin, J. Somorovsky, P. Jovanovic -
-     "Nonce-Disrespecting Adversaries Practical Forgery Attacks on GCM in TLS")
-   * Fix potential stack corruption in mbedtls_x509write_crt_der() and
+   * Removed the MBEDTLS_SSL_AEAD_RANDOM_IV option, because it was not compliant
+     with RFC-5116 and could lead to session key recovery in very long TLS
+     sessions. "Nonce-Disrespecting Adversaries Practical Forgery Attacks on GCM in
+     TLS" - H. Bock, A. Zauner, S. Devlin, J. Somorovsky, P. Jovanovic.
+     https://eprint.iacr.org/2016/475.pdf
+   * Fixed potential stack corruption in mbedtls_x509write_crt_der() and
      mbedtls_x509write_csr_der() when the signature is copied to the buffer
      without checking whether there is enough space in the destination. The
-     issue cannot be triggered remotely. (found by Jethro Beekman)
+     issue cannot be triggered remotely. Found by Jethro Beekman.
 
 Features
    * Added support for CMAC for AES and 3DES and AES-CMAC-PRF-128, as defined by
@@ -22,7 +23,7 @@ Features
    * Added the macro MBEDTLS_X509_MAX_FILE_PATH_LEN that enables the user to
      configure the maximum length of a file path that can be buffered when
      calling mbedtls_x509_crt_parse_path().
-   * Added a configuration file config-no-entropy.h that enables a subset of
+   * Added a configuration file config-no-entropy.h that configures the subset of
      library features that do not require an entropy source.
    * Added the macro MBEDTLS_ENTROPY_MIN_HARDWARE in config.h. This allows users
      to configure the minimum number of bytes for entropy sources using the
@@ -33,18 +34,18 @@ Bugfix
      may need time but not the standard C library abstraction, and added
      configuration consistency checks to check_config.h
    * Fix dependency issue in Makefile to allow parallel builds.
-   * Fix incorrect handling of block lengths in crypt_and_hash sample program,
-     when GCM is used. #441
+   * Fix incorrect handling of block lengths in crypt_and_hash.c sample program,
+     when GCM is used. Found by udf2457. #441
    * Fix for key exchanges based on ECDH-RSA or ECDH-ECDSA which weren't
      enabled unless others were also present. Found by David Fernandez. #428
    * Fix for out-of-tree builds using CMake. Found by jwurzer, and fix based on
      a contribution from Tobias Tangemann. #541
-   * Fixed cert_app sample program for debug output and for use when no root
+   * Fixed cert_app.c sample program for debug output and for use when no root
      certificates are provided.
    * Fix conditional statement that would cause a 1 byte overread in
      mbedtls_asn1_get_int(). Found and fixed by Guido Vranken. #599
    * Fixed pthread implementation to avoid unintended double initialisations
-     and double frees. (found by Niklas Amnebratt)
+     and double frees. Found by Niklas Amnebratt.
    * Fixed the sample applications gen_key.c, cert_req.c and cert_write.c for
      builds where the configuration MBEDTLS_PEM_WRITE_C is not defined. Found
      by inestlerode. #559.
@@ -72,7 +73,7 @@ Changes
    * Added support for a Yotta specific configuration file -
      through the symbol YOTTA_CFG_MBEDTLS_TARGET_CONFIG_FILE.
    * Added optimization for code space for X.509/OID based on configured
-     features. (contributed by Aviv Palivoda)
+     features. Contributed by Aviv Palivoda.
    * Renamed source file library/net.c to library/net_sockets.c to avoid
      naming collision in projects which also have files with the common name
      net.c. For consistency, the corresponding header file, net.h, is marked as