Sanitize CHANGES entry.

     [Steve Henson]

  +) Modify the behaviour of EVP_DigestInit() and EVP_DigestFinal() to retain

     compatibility with existing code. In particular the 'ctx' parameter is

     not assumed to be valid before the call to EVP_DigestInit() and it is tidied

     up after a call to EVP_DigestFinal(). A new function EVP_DigestFinal_ex()

     but does not free up the ctx. Also change function EVP_MD_CTX_copy() to

     assume the destination is uninitialized: EVP_MD_CTX_copy_ex() do assumes

     the destiation is valid. Also modify all the OpenSSL digest calls to call 

     EVP_DigestInit_ex(), EVP_DigestFinal_ex() and EVP_MD_CTX_copy_ex().

     compatibility with existing code. In particular the 'ctx' parameter does

     not have to be to be initialized before the call to EVP_DigestInit() and

     it is tidied up after a call to EVP_DigestFinal(). New function

     EVP_DigestFinal_ex() which does not tidy up the ctx. Similarly function

     EVP_MD_CTX_copy() changed to not require the destination to be

     initialized valid and new function EVP_MD_CTX_copy_ex() added which

     requires the destination to be valid.

     Modify all the OpenSSL digest calls to use EVP_DigestInit_ex(),

     EVP_DigestFinal_ex() and EVP_MD_CTX_copy_ex().

     [Steve Henson]

  +) Change ssl3_get_message (ssl/s3_both.c) and the functions using it