Version negotiation rewrite doc updates

Update various documentation references to the new TLS_*_method names. Also
add a CHANGES entry.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
diff --git a/doc/crypto/BIO_f_ssl.pod b/doc/crypto/BIO_f_ssl.pod
index a9f23f1..a0531b0 100644
--- a/doc/crypto/BIO_f_ssl.pod
+++ b/doc/crypto/BIO_f_ssl.pod
@@ -148,7 +148,7 @@
   * do it automatically
   */
 
- ctx = SSL_CTX_new(SSLv23_client_method());
+ ctx = SSL_CTX_new(TLS_client_method());
 
  /* We'd normally set some stuff like the verify paths and
   * mode here because as things stand this will connect to
@@ -212,7 +212,7 @@
 
  /* Might seed PRNG here */
 
- ctx = SSL_CTX_new(SSLv23_server_method());
+ ctx = SSL_CTX_new(TLS_server_method());
 
  if (!SSL_CTX_use_certificate_file(ctx,"server.pem",SSL_FILETYPE_PEM)
 	|| !SSL_CTX_use_PrivateKey_file(ctx,"server.pem",SSL_FILETYPE_PEM)