[PATCH] cipher:rsa: Fix the dead-code of stronger_key_check.

[NIIBE Yutaka]

Hello,

NIIBE Yutaka <gniibe at fsij.org> wrote:
> * cipher/rsa.c (check_secret_key): Rename from stronger_key_check
> to be enabled with ENABLE_STRONGER_CHECK.

I pushed this change to master.

Let us see if ENABLE_STRONGER_CHECK has any larger negative impact.

It would not be good to enable this macro as default now, in a minor
release.
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