Fix comment for SSL_ERROR_PENDING_CERTIFICATE.

As of 958346a5e7942093ce629972adba95f64d2a51ee, the callback is called
multiple times.

Change-Id: I40dafeb9f14de7d016644313ef137a0c85f0a24d
Reviewed-on: https://boringssl-review.googlesource.com/17725
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index 256485c..35ef083 100644
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -492,8 +492,7 @@
 
 /* SSL_ERROR_PENDING_CERTIFICATE indicates the operation failed because the
  * early callback indicated certificate lookup was incomplete. The caller may
- * retry the operation when lookup has completed. Note: when the operation is
- * retried, the early callback will not be called a second time.
+ * retry the operation when lookup has completed.
  *
  * See also |SSL_CTX_set_select_certificate_cb|. */
 #define SSL_ERROR_PENDING_CERTIFICATE 12