free cleanup almost the finale

Add OPENSSL_clear_free which merges cleanse and free.
(Names was picked to be similar to BN_clear_free, etc.)
Removed OPENSSL_freeFunc macro.
Fixed the small simple ones that are left:
        CRYPTO_free CRYPTO_free_locked OPENSSL_free_locked

Reviewed-by: Richard Levitte <levitte@openssl.org>

ssl/ssl_sess.c

diff --git a/ssl/ssl_sess.c b/ssl/ssl_sess.c
index eed38ca..cec5905 100644
--- a/ssl/ssl_sess.c
+++ b/ssl/ssl_sess.c
@@ -759,8 +759,7 @@
     if (ss->srp_username != NULL)
         OPENSSL_free(ss->srp_username);
 #endif
-    OPENSSL_cleanse(ss, sizeof(*ss));
-    OPENSSL_free(ss);
+    OPENSSL_clear_free(ss, sizeof(*ss));
 }
 
 int SSL_set_session(SSL *s, SSL_SESSION *session)