Fold num_renegotiations into total_renegotiations.

The only difference is SSL_clear_num_renegotiations which is never
called.

Change-Id: Id661c71e89d34d834349ad1f1a296e332606e6cc
Reviewed-on: https://boringssl-review.googlesource.com/4564
Reviewed-by: Adam Langley <agl@google.com>
3 files changed