Constructing extensions from a config file should not modify the config
file or input certificates, so everything here should be const.
While I'm here, fix various missing sk_FOO_push malloc failure checks.
Change-Id: Ic29b21248a9d9243050c771fd0ce1e1d77f7ce7f
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/56027
Reviewed-by: Bob Beck <bbe@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
David Benjamin
Adam Langley